CN105264276B

CN105264276B - Pipe joint

Info

Publication number: CN105264276B
Application number: CN201480031922.7A
Authority: CN
Inventors: 岛村晓夫; 饭塚建郎
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 2013-06-04
Filing date: 2014-05-26
Publication date: 2017-06-09
Anticipated expiration: 2034-05-26
Also published as: CN105264276A; JP2014234910A; TWI614442B; WO2014196404A1; JP5744107B2; TW201506294A

Abstract

Pipe joint (10) includes：Adapter body (16), it is resin-made and is formed as tubular, and is connected to body (40) and body (60), Inner Constitution stream (11) at two ends；Flange part (50), it is tabular and integrally formed with adapter body (16), is protruded from the periphery of adapter body (16), and be installed on mounting object thing (in Fig. 1, being floor (44))；And recess is (in Fig. 1, it is the 1st groove portion (54) and the 2nd groove portion (56)), its be formed at flange part (50) be connected to the 1st plate face (50A) of the side of mounting object thing and should with least one of the 2nd plate face (50B) of the 1st plate face (50A) opposition side face on, and the root side of flange part (50) is configured at, in the end on observation along flange part (50), the recess is around stream (11).

Description

Pipe joint

Technical field

The present invention relates to a kind of resinous pipe joint.

Background technology

As existing flanged pipe joint, it is known to the integrally formed product using metal (for example, bronze, brass etc.) Constitute for the connector portions of body connection and for the connector portions to be installed on into the convex of mounting object thing (for example, floor, wall etc.) The pipe joint (for example, Japanese Unexamined Patent Publication 2011-137526 publications) of edge.

The content of the invention

Problems to be solved by the invention

In recent years, from the viewpoint of based on cutting down the cost of flanged pipe joint, mitigating weight, above-mentioned one is being advanced The resinification of body formed products.

But, flanged pipe joint has external force due to docking head effect in the state of mounting object thing is installed on When, stress is easy to concentrate on the border between connector portions and flange part, therefore in the resinification of above-mentioned integrally formed product, it is necessary to Implementation increases considerably the wall thickness or the countermeasure using special high-intensity resin etc. of connector portions and the boundary member of flange part, Suppress cracking seif-citing rate to concentrate the generation of position (above-mentioned boundary member) and reduce leak risk.

The present invention makes in view of the above problems, and its problem is to provide one kind to suppress cost and i.e. Effect is set to have too strong external force to can also ensure that the pipe joint of resistance to leak performance.

The scheme for solving problem

The pipe joint of the 1st technical scheme of the invention includes：Adapter body, it is resin-made and is formed as tubular, and its Two ends connect for body respectively, the Inner Constitution stream of the adapter body；Flange part, its be tabular and with the adapter body one Body shapes, and is protruded from the periphery of the adapter body, and be installed on mounting object thing；And recess, it is formed at the flange 1st face of the side for being connected to the mounting object thing in portion and with least one of the 2nd face of the 1st face opposition side face On, and the root side of the flange part is configured at, in the end on observation along the adapter body, the recess is around the stream Road.

The effect of invention

Pipe joint according to described in the present invention, it is suppressed that cost, even and if acting on has the too strong external force also can be true Protect resistance to leak performance.

Brief description of the drawings

Fig. 1 is half cut-away sectional view of the pipe joint of the 1st implementation method.

Fig. 2 is the enlarged drawing in the arrow 2X portions of Fig. 1.

Fig. 3 is the top view of the 2nd plate face of the flange part of the pipe joint of the 1st implementation method.

Fig. 4 is the 4X-4X line sectional views of Fig. 1, and is the top view of the 1st plate face of flange part.

Fig. 5 is the half-sectional sectility of the pipe joint for representing the state that body is connected on the pipe joint of the 1st implementation method View.

Fig. 6 is to represent that effect has the state, along pipe joint of too strong external force on the pipe joint of the 1st implementation method The sectional view of axial direction.

Fig. 7 is the top view of the 1st plate face of the flange part of the pipe joint of the 2nd implementation method.

Specific embodiment

(the 1st implementation method)

Hereinafter, based on brief description of the drawings the 1st implementation method of the invention.

Half cut-away sectional view before the pipe joint 10 of the 1st implementation method, insertion body 40 is shown in Fig. 1.

Pipe joint 10 has the resinous adapter body 16 for being formed as tubular and Inner Constitution stream 11.In the joint One end (being in Fig. 1 upper end) of main body 16 is connected with body 60, and body 40 is connected with the other end (being in Fig. 1 lower end). Connection pipe body 60 and body 40 are distinguished by the two ends of adapter body 16, so that the stream in stream in body 60 and body 40 Road is connected by stream 11.

The adapter body 16 includes：Main part 12, it is tubular, and is formed by resin material；And pars intermedia 14, it is Tubular, and formed by resin material and be coated at main part 12.In addition, the Inner Constitution stream 11 of main part 12.Main part 12 Can be both formed from the same material with pars intermedia 14, it is also possible to formed by different resin materials.In addition, main part 12 is with Between portion 14 be, for example, shaped by double-colored shaping, insert molding.

Pipe joint 10 has the cover 18 of the tubular formed by resin material.Cover 18 overcoats and be sticked in the top of pars intermedia 14 Side.Being constituted between the cover 18 and pars intermedia 14 and main part 12 has the patchhole 20 of the ring-type for the insertion of body 40.

It is configured with for the metal system that body 40 is held in patchhole 20 (relative to the patience of liquid in the inner side of cover 18 Excellent metal (for example, stainless steel etc.)) lock ring 30.The lock ring 30 is the ring (ring bodies) that section is shaped generally as V-shaped, Configured in the way of another side (insertion side of body 60) of the opening portion side of substantially V-shaped towards adapter body 16. And, the opening portion side of lock ring 30 is relative with the top ends 14A of pars intermedia 14, the part abutting of the medial surface of substantially V-shaped In top ends 14A.In addition, the claw 36 on the inner circumferential side top of lock ring 30 can nip the outer surface of body 40.

The conical surface 18A that can be abutted for the lateral surface of the substantially V-shaped of lock ring 30 is formed with the inwall of cover 18.The cone Face 18A is formed towards the entrance side undergauge of patchhole 20.

In the inner side of cover 18, the entrance side of patchhole 20 is being leaned on than lock ring 30 (here, referring to another with adapter body 16 Side identical side.) position in be inserted with can be mobile along the axial direction (axial direction with adapter body 16 is synonymous) of pipe joint 10 Release ring 22.The release ring 22 is formed by resin material and is substantially tubular, and the inwall of the release ring 22 constitutes patchhole 20 A part.

In the inboard by patchhole 20 of the release ring 22 (here, referring to the side identical with adapter body 16 Side.) periphery, be circumferentially formed with projection 22A, abutted against by the minor diameter part 18B with the inner circumferential for being formed at cover 18, so that anti- Coming off from cover 18 is stopped.The top ends 22B of projection 22A is formed as the cone-shaped that top attenuates, and along the radial direction of lock ring 30 The outer peripheral face of inner side is configured.

In main part 12, two circumferential groove 12A are formed with the outer peripheral face facing with patchhole 20, in these circumferential grooves 12A is respectively embedded into the seal ring 24 of rubber system, ring-type.

Main part 12 than circumferential groove 12A, by inboard position and in the most inboard portion of patchhole 20, is being formed with external diameter expansion The wall 13 in footpath.The top for having the body 40 being inserted into patchhole 20 is abutted on the wall 13.That is, wall 13 is used as pipe The stop part of body 40.

In addition, in a side of main part 12, (side with adapter body 16 is synonymous.) be formed with for being formed at body (being screwed into) the internal thread 12B of the external screw thread 60A connections of 60 one end.In addition, one end of main part 12 (adapter body 16 One end) it is formed with flange part 50 for being installed to mounting object thing (in the present embodiment, floor 44).It is discussed below flange The detailed content in portion 50.

The body 40 of present embodiment is resin-made, and body 60 is metal system.In addition, body 40 is not limited to resin-made, Can also be rubber system, metal system (metal material that can be nipped for the claw 36 of lock ring 30) or other materials.In addition, body 60 are not limited to metal system, or high-intensity resin system.

The top view of the 2nd plate face 50B of the flange part 50 of pipe joint 10 shown in Fig. 1 is shown in Fig. 3, is shown in Fig. 4 The top view of the 1st plate face 50A of the flange part 50 of the pipe joint 10 shown in Fig. 1.Flange part 50 is integrally formed with main part 12, And circumferential radial outside is protruded from outside one end of main part 12.In addition, flange part 50 be formed as tabular (in the present embodiment for It is discoideus).1st plate face 50A of the another side of the adapter body 16 of the flange part 50 is abutted and is positioned in floor described later 44 Ground 44A on, the 2nd plate face 50B of a side of adapter body 16 outwards (in the present embodiment, upwards) configuration.

As shown in figure 3, being formed with flange part 50 multiple for being installed on ground by the flange part 50 using fixture 46 The through hole 52 of the ground 44A of plate 44.These through holes 52 flange part 50 outer edge side (radial outside) with from flange part 50 The equal mode of central angle is formed the heart at spaced intervals in the circumferential.In addition, in the present embodiment, being formed on flange part 50 Through hole 52, but the present invention is not limited to the structure, it is also possible to replace through hole 52 and form outside to footpath on flange part 50 Unlimited slit in side etc., ground 44A is installed on using the slit and using fixture 46 by flange part 50.Alternatively, it is also possible to Both through hole 52 and above-mentioned slit are formed on flange part 50 respectively.

As shown in Fig. 2 through hole 52 includes hole portion 52A and tapered portion 52B.Hole portion 52A can be for the threaded portion of fixture 46 46B runs through, and tapered portion 52B is formed to receive the cone-shaped of the screw head 46A of fixture described later 46.

Although eliminating diagram in Figure 5, the fixture 46 of flange part 50 is fixed on floor 44.As shown in figure 1, should Fixture 46 includes screw head 46A and threaded portion 46B.Fixture 46 is created as threaded portion 46B can be screwed into floor 44 Tapping screw, so-called sunk screw.In through hole 52, the threaded portion 46B of fixture 46 is inserted to hole portion 52A, screw The lower surface (conical surface) of head 46A is connected to tapered portion 52B.Like this, flange part 50 is fixed on ground using fixture 46 Plate 44.

In addition, in other embodiment of the invention, it is also possible to which fixture 46 is set to the spiral shell in addition to sunk screw Nail (for example, flat head screw etc.), the hole of the constant diameter that through hole 52 is set to run through for fixture 46.

As shown in Figure 2 and Figure 4, in the 1st plate face 50A the (the of the invention 1st of the side for being connected to ground 44A of flange part 50 One of face) on, lean on the position of root side (in other words, the radially inner side of flange part 50) in the ratio outer rim 50C sides of flange part 50 It is formed with the 1st groove portion 54 (being formed at of the recess in the 1st face of the invention).Along the axial direction of adapter body 16 (in this reality In applying mode, the thickness of slab direction identical direction with flange part 50) observation when, in the way of the 1st groove portion 54 is to surround stream 11 It is configured at the 1st plate face 50A.Specifically, the 1st groove portion 54 is formed as ring-type centered on stream 11 and (in the present embodiment, is It is circular).In addition, the 1st groove portion 54 of present embodiment is formed near the root of flange part 50.

As shown in Fig. 2 the 1st groove portion 54 is included in trench bottom 54B (groove deepest part), the radially inner side of arc-shaped bend Trough wall surface (one of the recess face of the invention) 54A and radial outside in arc-shaped bend of (root side of flange part 50) The trough wall surface 54C of (the outer rim 50C sides of flange part 50).In addition, in the present embodiment, the radius of curvature of trough wall surface 54A is more than The radius of curvature of trench bottom 54B.In addition, trough wall surface 54A is in arc-shaped bend while outer peripheral face 12S light with main part 12 Sliding ground is continuous.Specifically, the outer peripheral face 12S of main part 12 is in arc-shaped in the way of external diameter becomes larger towards flange part 50 Bending, the bending section is glossily continuous with trough wall surface 54A.

In addition, in the present embodiment, the above-mentioned bending section of outer peripheral face 12S and trough wall surface 54A are with identical curvature half Footpath bends, and constitutes a flexure plane.

As shown in Figures 2 and 3, in the 2nd plate face 50B the (the of the invention 2nd with the 1st plate face 50A opposition sides of flange part 50 One of face) on, it is formed with the 2nd groove portion 56 by the position of root side in the ratio outer rim 50C sides of flange part 50 and (is formed at the present invention One of recess of the 2nd face).When the axial direction (the thickness of slab direction of flange part 50) along adapter body 16 is observed, the 2nd groove portion 56 to surround stream 11 in the way of be configured at the 2nd plate face 50B.Specifically, the 2nd groove portion 56 is formed as ring centered on stream 11 Shape (being in the present embodiment, circular).In addition, as shown in Fig. 2 the cross sectional shape of the 2nd groove portion 56 is formed as arc-shaped, and Formed in the way of a part of (radial inside portion of the 2nd groove portion 56) is across the end face to main part 12.In addition, the present invention is simultaneously It is not limited to said structure, it is also possible to be set to the structure of the part not across the end face to main part 12 of the 2nd groove portion 56.Example Such as, it is also possible to be set to the structure being integrally formed on the 2nd plate face 50B of the 2nd groove portion 56.

As shown in Figure 1 and Figure 4, in the present embodiment, a part (the radially inner side portion of the 1st groove portion 54 of the 1st groove portion 54 Point) heavy in the end on observation along adapter body 16 with a part (radial outside portion of the 2nd groove portion 56) for the 2nd groove portion 56 It is folded.In addition, the present invention is not limited to said structure, the 1st groove portion 54 and the 2nd groove portion 56 can also be in the axles along adapter body 16 Do not overlapped during to observation.

In the present embodiment, main part 12 and flange part 50 are formed as the integrally formed product of same resin material. This, as the resin material for forming main part 12 and flange part 50, based on mechanical strength from the viewpoint of, it is preferred to use it is poly- The engineering plastics or glass of acetal (POM), polyamide (PA), makrolon (PC), polyethylene terephthalate (PET) etc. The fiber-reinforced resin of fiber-reinforced resin (GFRP), carbon-fiber reinforced resins (CFRP) etc..In addition, as fiber-reinforced resin Matrix resin (mother metal), known resin can be used.

Then, installation of the pipe joint 10 to floor 44 is illustrated.

First, the top of underfloor body 40 is fetched on floor from floor openings 44H.Floor openings 44H is pre-formed Need position, the cover 18 with diameter greater than pipe joint 10 of floor openings 44H maximum outside diameter (pipe joint 10 except flange part 50 The part of maximum diameter in addition), and less than the external diameter of flange part 50.

Then, body 40 is connected to pipe joint 10.When in the patchhole 20 by the top ends of body 40 to pipe joint 10 During insertion, the top of body 40 makes lock ring 30 expanding.Then, while making the claw of the outer peripheral face sliding contact lock ring 30 of body 40 Body 40, the inner peripheral surface contact seal ring 24 of body 40 are inserted in surface side inwards on 36 one side.When body 40 is further inserted into, body 40 top reaches the wall 13 of main part 12.

Under the installment state shown in Fig. 5, when internal pressure acts on body 40, body 40 is subject to be come off from adapter body 16 Direction power.Thus, body 40 and lock ring 30 are moved slightly towards the direction come off from patchhole 20, the ring portion 31 of lock ring 30 Outer circumferential side is resisted against the conical surface 18A of cover 18.Thus, as shown in figure 5, the claw 36 of lock ring 30 nips the outer circumferential side of body 40.This When, the claw 36 of lock ring 30 is oblique due to being rolled towards the inside of patchhole 20, is thus susceptible to nip body 40, and the court of claw 36 To the direction in opposite direction with the extraction of body 40, body 40 is difficult to come off.

Then, body 40 is returned under floor from floor openings 44H, and make to be connected with the master of the pipe joint 10 of body 40 Be positioned in the 1st plate face 50A of flange part 50 on the 44A of ground through floor openings 44H by body portion 12.Then, by fixture 46 to The hole portion 52A of through hole 52 is inserted into, and threaded portion 46B is screwed into floor 44, until the lower surface (conical surface) of screw head 46A is supported It is connected to tapered portion 52B.Thus, flange part 50 is installed on ground 44A.That is, pipe joint 10 be installed on floor 44 (mounting object thing One).

Then, one end that the formation of body 60 has external screw thread 60A is screwed into the internal thread 12B of pipe joint 10 and by pipe joint 10 couple together with body 60.Thus, body 60 is connected with body 40 by pipe joint 10.In addition, the other end of body 60 Portion is for example connected to water appliance etc..

In the pipe joint 10 of present embodiment, when in the state of flange part 50 is installed on into floor 44 in adapter body When effect has too strong external force on 16, stress is not to concentrate on the side between adapter body 16 (main part 12) and flange part 50 Boundary, but concentrate on the 1st groove portion 54 and the 2nd groove portion 56 (that is, the thin part of the wall of flange part 50) of flange part 50.Here, Because stress concentration is in the case where at least one of the 1st groove portion 54 and the 2nd groove portion 56 groove portion generate cracking, the cracking exists (in the present embodiment, a part for the 1st groove portion 54 and a part for the 2nd groove portion 56 are in thickness of slab in the thickness of slab direction of flange part 50 Overlapped on direction, because the overlapping portion bulkhead is thin, therefore cracking is easy to develop on thickness of slab direction.) and groove bearing of trend on send out Exhibition.Therefore, above-mentioned cracking is reliably prevent to develop towards adapter body 16 and reach stream 11 via adapter body 16, will not Leak is produced from adapter body 16.That is, when effect has too strong external force in the adapter body 16 of pipe joint 10, by with the At least one of 1 groove portion 54 and the 2nd groove portion 56 groove portion are that starting point produces the breakages such as cracking such that it is able to avoid cracking arrival from connecing Head main body 16, is as a result able to ensure that resistance to leak performance.Further, since utilizing the 1st groove in the end on observation along adapter body 16 The groove portion 56 of portion 54 and the 2nd around stream 11, even if therefore too strong external force acts on adapter body 16 from any direction, also can Enough ensure resistance to leak performance.

According to the above, according to pipe joint 10, for example, with significantly thicken between adapter body 16 and flange part 50 The wall thickness of boundary member or compared using the pipe joint of special high-intensity resin, using forming the 1st groove on flange part 50 The construction of cost is inhibited as the groove portion 56 of portion 54 and the 2nd, even if being obtained in that effect has too strong external force can also ensure that Effect as resistance to leak performance.

In addition, in pipe joint 10, due to making the trough wall surface 54A and adapter body in arc-shaped bend of the 1st groove portion 54 The above-mentioned bending section of 16 outer peripheral face 12S is glossily continuous, therefore, it is possible to relax stress concentration in radially inner side (stream 11 Side) the 1st groove portion 54 trough wall surface 54A or trough wall surface 54A and the above-mentioned bending section of outer peripheral face 12S between border feelings Condition.Thereby, it is possible to suppress to produce the cracking with trough wall surface 54A or above-mentioned borders as starting point.That is, cracking can be more reliably prevented from From adapter body 16 to the development of stream 11.

And then, as shown in fig. 6, when body 60 is to be inclined because of the input (external force) in arrow F directions, too strong external force from Body 60 acts on adapter body 16 and tensile stress concentrates on the inclined positioned at body 60 of the 1st groove portion 54 in flange part 50 The part of side, compression stress is concentrated on positioned at the part of its opposition side.On the other hand, compression stress concentrates on the of flange part 50 The part positioned at the inclined side of body 60 of 2 groove portions 56, tensile stress is concentrated on positioned at the part of its opposition side.Here, due to Adapter body 16 and flange part 50 are formd using resin material, therefore the part of cracking self stretch stress concentration is produced (in Fig. 6 In, as one, it is indicated with cracking K).That is, by forming the 1st groove portion 54 on the 1st plate face 50A of flange part 50, The 2nd groove portion 56 is formed on 2nd plate face 50B, so that the cracking generating unit (damaged part) of easily controllable flange part 50.

In the 1st implementation method, the 1st groove portion 54 is formd on the 1st plate face 50A, the 2nd is formd on the 2nd plate face 50B Groove portion 56, but the present invention is not limited to the structure, it is also possible to it is set to be formed only on the 1st plate face 50A the knot of the 1st groove portion 54 Structure (that is, does not form the structure of the 2nd groove portion 56) on the 2nd plate face 50B, can also be set to form the 2nd only on the 2nd plate face 50B The structure (that is, the structure of the 1st groove portion 54 is not formed on the 1st plate face 50A) of groove portion 56.Even if in this case, it is also possible to really Protect the resistance to leak performance of the adapter body 16 when too strong external force acts on pipe joint 10.

In addition, in the 1st implementation method, the 1st groove portion 54 is formd on the 1st plate face 50A, but the present invention is not limited In the structure, replace on the 1st plate face 50A and form the 1st groove portion 54, it is also possible to the multiple 1st is formed in the way of around stream 11 Recess 72 (being formed at the other examples of the recess in the 1st face of the invention) (reference picture 7).In addition, replacing on the 2nd plate face 50B Form the 2nd groove portion 56, it is also possible to multiple second recesses (omitting diagram) are formed in the way of around stream 11.Furthermore, it is also possible to The 1st recess 72 is formed on 1st plate face 50A and second recesses is formed on the 2nd plate face 50B.Even if in this case, it is also possible to The resistance to leak performance of the adapter body 16 when ensuring that too strong external force acts on pipe joint 10.

And, in the 1st implementation method, the trough wall surface 54A of the 1st groove portion 54 is smooth with the outer peripheral face 12S of adapter body 16 Ground is continuous, but the present invention be not limited to the structure, or, the 1st groove portion 54 is relative to outer peripheral face 12S at spaced intervals Configured, the rough ground of trough wall surface 54A and outer peripheral face 12S is continuous.As long as that is, the ratio outer rim of the flange part 50 of the 1st groove portion 54 Position of the 50C sides by root side, it is possible to be formed at optional position.Similarly, as long as the ratio of the 2nd groove portion 56 also flange part 50 Position of the outer rim 50C sides by root side, it is possible to be formed at optional position.In addition, the 1st groove portion 54 and the 2nd groove portion 56 can also Do not overlapped on the thickness of slab direction of flange part 50 in the end on observation along adapter body 16.

In addition, other grooves, recess can also be formed in addition to forming the 1st groove portion 54 on the 1st plate face 50A, in the 2nd plate On the 50B of face other grooves, recess can also be formed in addition to forming the 2nd groove portion 56.

Furthermore, it is also possible to the trench bottom 54B of the 1st groove portion 54 is coupled together with the trench bottom of the 2nd groove portion 56 using hole.

In the 1st implementation method, pipe joint 10 is installed on floor 44, but the present invention is not limited to the structure, only If being capable of the position of mounting flange portion 50, pipe joint 10 can just be installed on ceiling, wall etc..

In addition, in the 1st implementation method, adapter body 16 is formed for straight tubular, but the present invention is not limited Due to the structure, adapter body 16 can also be formed as the tubular (so-called, union elbow) in midway bending, it is also possible to be formed It is other shapes.

And, in the 1st implementation method, the circumferential radial outside from outside one end of adapter body 16 of flange part 50 is protruded, but It is that the present invention is not limited to the structure, flange part 50 can also be prominent from the outer circumferential radial outside of the pars intermedia of adapter body 16 Go out.

More than, enumerate implementation method and illustrate embodiments of the present invention, but these implementation methods are one, not Depart from and can carry out various changes in the range of purport and implement.In addition, protection scope of the present invention is not limited to this certainly A little implementation methods.

Claims

1. a kind of pipe joint, wherein,

The pipe joint includes：

Adapter body, it is resin-made and is formed as tubular, and its two ends connects for body respectively, the inside structure of the adapter body Into stream；

Flange part, it is tabular and integrally formed with the adapter body, is protruded from the periphery of the adapter body, and be installed on Mounting object thing；And

Upper side pocket, it is formed at the with the 1st face opposition side of the side for being connected to the mounting object thing the 2nd of the flange part On face, and the root side of the flange part and the position that with the insert port of the body separate are configured at, along the joint master During the end on observation of body on this side pocket around the stream.

2. pipe joint according to claim 1, wherein,

The pipe joint includes underside recess, and the underside recess is formed on the 1st face, and is configured at the root of the flange part Side, in the end on observation along the adapter body, the underside recess is around the stream.

3. pipe joint according to claim 2, wherein,

A part for the underside recess is heavy in the end on observation along the adapter body with a part for the upper side pocket It is folded.

4. pipe joint according to claim 2, wherein,

The underside recess or the upper side pocket be in the end on observation along the adapter body centered on the stream Ring-type groove.

5. the pipe joint according to any one of claim 2~4, wherein,

The underside recess has the outer peripheral face with the adapter body glossily continuously in the recess face of arc-shaped bend.

6. a kind of pipe joint, wherein,

The pipe joint includes：

Underside recess, it is formed at being connected on the 1st face of the side of the mounting object thing of the flange part, and is configured at institute The root side of flange part is stated, the underside recess is around the stream in the end on observation along the adapter body, and cuts Face shape is in arc-shaped bend.

7. pipe joint according to claim 6, wherein,

The pipe joint includes upper side pocket, and side pocket is formed on the 2nd face with the 1st face opposition side on this, and is configured at The root side of the flange part, in the end on observation along the adapter body on this side pocket around the stream.

8. pipe joint according to claim 7, wherein,

9. pipe joint according to claim 7, wherein,

10. the pipe joint according to any one of claim 6~9, wherein,