JP5967271B2 - Fitting and fitting mounting structure - Google Patents

Description

  The present invention relates to a joint and a joint mounting structure.

  Conventionally, a joint for connecting a mounting member such as a faucet instrument and a pipe body such as a resin pipe is known. The joint includes an inner cylinder member (insert member) and an outer cylinder member disposed outside the inner cylinder member. The joint is attached to the attachment member. The tubular body is inserted into a space formed between the inner cylinder member and the outer cylinder member of the joint.

  For example, in Patent Document 1, an inner cylinder member (sleeve) of a joint is held by an attachment member (base part) and an outer cylinder member (intermediate part) of the joint, and the outer cylinder member is connected to the attachment member by insertion. An improved joint (pipe joint) is disclosed.

JP 2006-97879 A

  In the joint of Patent Document 1, the inner cylinder member has a flange that protrudes greatly outward in the radial direction. The flange of the inner cylinder member is sandwiched between the mounting member and the outer cylinder member, and movement in the axial direction is restricted. Therefore, the structure for holding the inner cylinder member is complicated, and the assembling property between members is reduced.

  Moreover, if a flange is provided on the inner cylinder member, the radial dimension of the joint increases. Moreover, if the thickness of the flange of the inner cylinder member is small, the strength of the flange cannot be sufficiently secured, the flange may be broken, and the inner cylinder member may not be sufficiently retained. On the other hand, if the thickness of the flange is large, the axial dimension of the joint becomes large.

  Furthermore, the outer cylinder member of the joint is connected to the mounting member by insertion. For this reason, the connection of the outer cylinder member to the mounting member becomes insufficient, and the outer cylinder member comes off. Thereby, the inner cylinder member cannot be sufficiently held by the mounting member and the outer cylinder member, and the inner cylinder member is detached.

  The present invention has been made in view of such a background, and has a simple structure, can be easily assembled and reduced in size, and can easily and securely hold an inner cylinder member and a joint mounting. It is intended to provide a structure.

  One aspect of the present invention is a joint that is disposed between an attachment member and a tubular body and connects the two, and the attachment member has an attachment housing portion that accommodates and attaches the joint inside. The mounting housing portion is provided with a first housing portion and a second housing portion that is closer to the joint than the first housing portion and has an inner diameter larger than that of the first housing portion. Has an inner cylinder member and an outer cylinder member which is disposed outside the inner cylinder member and forms an insertion space for inserting and arranging the tubular body between the inner cylinder member and the inner cylinder member The inner cylinder small-diameter portion inserted and arranged inside the second accommodating portion, the outer diameter of the first inner cylinder small-diameter portion is larger than the inner cylinder small-diameter portion on the attachment member side. An inner cylinder large-diameter portion that is inserted and disposed inside the housing portion, and the outer cylinder member is disposed outside the small inner-diameter portion. And an outer cylinder insertion portion that is inserted and arranged inside the second housing portion together with the inner cylinder small diameter portion, and the outer diameter of the inner cylinder large diameter portion is smaller than the outer diameter of the outer cylinder insertion portion, It is larger than the inner diameter of the outer cylinder insertion part and smaller than the inner diameter of the first housing part, and is inserted inside the second housing part between the outer cylinder insertion part and the second housing part. The joint is characterized in that a retaining member for preventing the outer cylinder insertion portion from being detached is disposed.

  Another aspect of the present invention is a joint mounting structure in which a joint for connecting the mounting member and a tubular body is attached to the mounting member, and the mounting member receives the joint inside to be attached. A housing portion is provided, and the mounting housing portion is provided with a first housing portion and a second housing portion that is closer to the joint than the first housing portion and has a larger inner diameter than the first housing portion. The joint includes an inner cylinder member and an outer cylinder member that is disposed outside the inner cylinder member and forms an insertion space in which the tubular body is inserted and arranged between the inner cylinder member, The inner cylinder member has an inner cylinder small-diameter portion inserted and arranged inside the second housing portion, and is closer to the attachment member than the inner cylinder small-diameter portion and has an outer diameter larger than the inner cylinder small-diameter portion, An inner cylinder large-diameter portion that is inserted and arranged inside the first housing portion, and the outer cylinder member includes the inner cylinder small-diameter portion. And an outer cylinder insertion portion that is inserted and arranged inside the second housing portion together with the inner cylinder small diameter portion, and the outer diameter of the inner cylinder large diameter portion is the same as that of the outer cylinder insertion portion. It is smaller than the outer diameter, larger than the inner diameter of the outer cylinder insertion portion, and smaller than the inner diameter of the first housing portion, and between the outer tube insertion portion and the second housing portion, the second The joint mounting structure is characterized in that a retaining member for preventing the outer cylinder insertion portion inserted and disposed inside the housing portion from being detached is disposed.

  In the joint and the joint mounting structure, the joint having the inner cylinder member (the inner cylinder small diameter portion, the inner cylinder large diameter portion) and the outer cylinder member (outer cylinder insertion portion) having the above-described configuration is mounted and accommodated in the above configuration of the mounting member It is inserted and arranged inside the portion (first housing portion, second housing portion). And the retaining member is arrange | positioned between the outer cylinder insertion part of the outer cylinder member of a coupling, and the 2nd accommodating part of the attachment accommodating part of an attachment member.

  For this reason, the retaining member can sufficiently prevent the outer cylinder member from coming off the mounting member. Thereby, an inner cylinder member is hold | maintained inside the attachment accommodating part (1st accommodating part, 2nd accommodating part) of an attachment member, and the outer cylinder insertion part of an outer cylinder member. That is, the inner cylinder member can be sufficiently held by the mounting member and the outer cylinder member. Moreover, since the outer cylinder member can be prevented from coming off from the mounting member by the retaining member, it is possible to prevent the inner cylinder member from coming off from the mounting member.

  Further, the outer diameter of the inner cylinder large diameter part is smaller than the outer diameter of the outer cylinder insertion part. The inner cylinder large-diameter portion is on the attachment member side (joint insertion direction) with respect to the outer cylinder insertion portion disposed outside the inner cylinder small-diameter portion. Therefore, the movement of the inner cylinder large-diameter portion in the removal direction of the inner cylinder member (direction opposite to the insertion direction) is restricted by the outer cylinder insertion portion. As a result, the effect of preventing the inner cylinder member from coming off can be enhanced, and the inner cylinder member can be securely held.

  Further, as described above, the inner cylinder member can be held with a simple structure. Therefore, it becomes easy to assemble the members in the mounting member and the joint (inner cylinder member, outer cylinder member). Moreover, what is necessary is just to provide a large part (inner cylinder large diameter part) and a small part (inner cylinder small diameter part) in an inner cylinder member. Therefore, compared with the case where a flange is provided in the inner cylinder member as in the prior art, for example, the axial size and radial size of the joint (joint mounting structure) can be reduced.

  Thus, according to the present invention, it is possible to provide a joint and a joint mounting structure that have a simple structure, can be easily assembled and reduced in size, and can hold the inner cylinder member sufficiently and securely. Can do.

  In the joint and the joint mounting structure, the retaining member is a C ring, and a retaining groove for disposing the retaining member is disposed in a circumferential direction on an outer peripheral surface of the outer tube insertion portion of the outer tube member. It may be formed along. In this case, the outer cylinder member can be more reliably prevented from coming off by the retaining member (C ring). Moreover, the retaining groove for mounting the retaining member can be easily formed. Moreover, the retaining member can be easily mounted in the retaining groove.

  An annular water stop that stops water between the inner cylinder member and the mounting housing portion between the inner cylinder large-diameter portion of the inner cylinder member and the first housing portion of the mounting housing portion. A member is provided, and a water stop groove for disposing the water stop member may be formed along the circumferential direction on the outer peripheral surface of the inner cylinder large diameter portion. In this case, the water stop member can sufficiently stop water (seal) between the inner cylinder member (joint) and the attachment housing portion (attachment member). Moreover, the water stop ditch | groove which mounts a water stop member can be formed easily. Further, the water stop member can be easily mounted in the water stop groove.

  Moreover, the structure which attaches to the said attachment member in the state which assembled | attached the said inner cylinder member and the said outer cylinder member may be sufficient as the said coupling. In this case, the operation | work which attaches a coupling to an attachment member becomes easy. In addition, as an assembling method of the inner cylinder member and the outer cylinder member, for example, the inner cylinder member is press-fitted inside the outer cylinder member, or both are engaged with the inner cylinder member inserted inside the outer cylinder member. Various assembling methods can be used, such as a method of doing so.

  The said joint attachment structure WHEREIN: The structure by which the cover member which covers at least one part of the outer peripheral surface may be attached to the said 2nd accommodating part of the said attachment accommodating part. In this case, for example, the diameter of the second accommodating portion is increased by an external factor (heat or the like), and the outer cylinder insertion portion (outer cylinder member) inserted and disposed inside the second accommodating portion is disconnected. It can prevent by the cover member which covers the outer peripheral surface of a 2nd accommodating part.

  Moreover, the structure which consists of resin (elastic resin) which has elasticity may be sufficient as the said 2nd accommodating part of the said attachment accommodating part. In this case, for example, a concave groove (for example, a concave groove to be described later) for disposing a retaining member is formed on the inner peripheral surface of the second accommodating portion, and the inner side of the second accommodating portion has an undercut shape. The second housing part can be formed by deforming the second housing part and removing the mold, so-called forced removal. In addition, when a 2nd accommodating part consists of elastic resin, since a 2nd accommodating part becomes easy to thermally deform, it is preferable to provide the above-mentioned cover member and to suppress the diameter expansion of a 2nd accommodating part.

It is a partial cross section explanatory view showing the joint and joint attachment structure of Embodiment 1. It is a partial cross-section explanatory drawing which shows the joint of the state which attached the tubular body, and a joint attachment structure. (A) is a side view which shows an attachment member, (B) is a partial cross section explanatory view which shows an attachment member. It is an expanded view which shows the member which comprises a coupling. It is a section expanded view showing the member which constitutes a joint. (A) is a side view which shows a coupling, (B) is sectional drawing which shows a coupling. 6 is a cross-sectional view illustrating another example of the joint of Embodiment 1. FIG. It is a partial cross-section explanatory drawing which shows the coupling of Embodiment 2, and a coupling attachment structure. It is a partial cross-section explanatory drawing which shows the coupling of Embodiment 2, and a coupling attachment structure. It is sectional explanatory drawing which shows the coupling and joint attachment structure of Embodiment 3. It is sectional explanatory drawing which shows the coupling and joint attachment structure of Embodiment 3.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
As shown in FIGS. 1-6, the coupling 1 of this embodiment is arrange | positioned between the attachment member 7 and the pipe body 8, and connects both. Further, the joint mounting structure 10 of the present embodiment is a structure for mounting the joint 1 for connecting the mounting member 7 and the tubular body 8 to the mounting member 7.

  The mounting member 7 is provided with a mounting housing portion 70 that houses and attaches the joint 1 inside. The attachment housing portion 70 is provided with a first housing portion 71 and a second housing portion 72 that is closer to the joint 1 than the first housing portion 71 and has a larger inner diameter than the first housing portion 71. The joint 1 includes an inner cylinder member 2 and an outer cylinder member 3 that is disposed outside the inner cylinder member 2 and forms an insertion space 11 into which the tubular body 8 is inserted and disposed.

  The inner cylinder member 2 has an inner cylinder small diameter portion 22 inserted and arranged inside the second accommodating portion 72, and has an outer diameter that is closer to the mounting member 7 than the inner cylinder small diameter portion 22 and is smaller than the inner cylinder small diameter portion 22. A large inner cylinder large-diameter portion 21 that is inserted and arranged inside the first accommodating portion 71 is provided. The outer cylinder member 3 is provided with an outer cylinder insertion portion 31 that is arranged outside the inner cylinder small diameter portion 22 and is inserted and arranged inside the second housing portion 72 together with the inner cylinder small diameter portion 22. The outer diameter of the inner cylinder large diameter part 21 is smaller than the outer diameter of the outer cylinder insertion part 31. Between the outer cylinder insertion part 31 and the second housing part 72, a retaining member 41 for preventing the outer cylinder insertion part 31 inserted and arranged inside the second housing part 72 from being disposed is disposed. . Hereinafter, the joint 1 and the joint mounting structure 10 will be described in detail.

  As shown in FIGS. 3A and 3B, the attachment member 7 is a general ball-type water stop cock. The attachment member (water stopcock) 7 has a main body 700. An internal channel 701 is formed inside the main body 700. In the internal flow path 701, a ball-type valve body (not shown) serving as a water stop valve is disposed. The valve body can be opened and closed by an operation portion (handle portion) 702.

  The mounting member 7 is provided with a cylindrical mounting housing portion 70 that protrudes in a predetermined direction (the joint 1 side). A concave space is formed inside the attachment housing portion 70. The mounting member 7 is made of an elastomer-blended polyphenylene sulfide (PPS) whose main portion including the mounting housing portion 70 is an elastic resin.

  The attachment housing portion 70 includes a first housing portion 71 provided on the base end side (the side opposite to the joint 1) and a second housing portion 72 provided on the distal end side (the joint 1 side). The 1st accommodating part 71 and the 2nd accommodating part 72 are provided adjacent. The inner space of the first housing portion 71 and the inner space of the second housing portion 72 are in communication with each other. The inner diameter of the second housing part 72 is larger than the inner diameter of the first housing part 71.

  A first bottom surface 711 is provided at the proximal end of the first housing portion 71. A second bottom surface 721 is provided at the base end of the second housing portion 72. An opening 722 into which the joint 1 is inserted is provided at the tip of the second housing portion 72. On the inner peripheral surface of the second storage portion 72, a storage concave groove 723 in which the retaining member 41 is disposed is formed along the circumferential direction. In addition, an inclined surface (tapered surface) 724 whose inner diameter gradually increases toward the distal end side is formed on the inner peripheral surface of the second accommodating portion 72 on the distal end side with respect to the accommodating concave groove 723.

  A cylindrical cover member 73 that covers the outer peripheral surface of the second housing portion 72 is attached. The cover member 73 restrains the second storage portion 72 from the outside, and prevents the second storage portion 72 from expanding in diameter due to an external factor (heat or the like). The cover member 73 is made of a metal such as stainless steel.

  As shown in FIGS. 4 and 5, the joint 1 includes an inner cylinder member 2 and an outer cylinder member 3. A retaining member 41, a lock ring 51, an insertion guide 54, a split ring 53, a cap 52, and the like are attached to the joint 1 (the inner cylinder member 2 and the outer cylinder member 3).

  The inner cylinder member 2 (insert member) is formed in a cylindrical shape. The inner cylinder member 2 is made of a synthetic resin such as polyphenylene sulfide (PPS). The inner space of the inner cylinder member 2 is a flow path through which fluid flows. An inner cylinder insertion portion 20 is provided on one end side (attachment member 7 side) in the axial direction of the inner cylinder member 2. An inner cylinder main body portion 23 is provided on the other end side in the axial direction of the inner cylinder member 2 (on the side opposite to the attachment member 7, the tube body 8 side).

  The inner cylinder insertion part 20 has an inner cylinder large diameter part 21 and an inner cylinder small diameter part 22 in order from the distal end side (attachment member 7 side). The outer diameter of the inner cylinder large diameter part 21 is larger than the outer diameter of the inner cylinder small diameter part 22 and smaller than the outer diameter of the outer cylinder insertion part 31 of the outer cylinder member 3. On the outer peripheral surface of the inner cylinder large diameter portion 21, a water stop groove 211 is formed along the circumferential direction. An annular seal member (water stop member) 42 is mounted in the water stop groove 211.

  Two concave grooves 231 are formed on the outer peripheral surface of the inner cylinder main body 23 along the circumferential direction. An annular seal member 43 is mounted in each of the two concave grooves 231. The outer diameter of the inner cylinder main body part 23 is smaller than the outer diameters of the inner cylinder large diameter part 21 and the inner cylinder small diameter part 22.

  The outer cylinder member 3 is formed in a cylindrical shape. The outer cylinder member 3 is made of a synthetic resin such as polyamide (particularly PA12), polyphenylsulfone (PPSU), polycarbonate (PC) or the like. The outer cylinder member 3 of the present embodiment is made of a resin having transparency so that it can be visually confirmed that the tube body 8 is inserted into the insertion space 11. An outer cylinder insertion portion 31 is provided at one end of the outer cylinder member 3 in the axial direction (end on the attachment member 7 side). A cap attachment portion 32 to which a cap 52 is attached is provided at the other end portion in the axial direction of the outer cylinder member 3 (the opposite side to the attachment member 7 and the end portion on the tube body 8 side).

  The outer diameter of the outer cylinder insertion portion 31 is gradually increased toward the distal end side (mounting member 7 side) so as to correspond to the inclined surface 724 of the second housing portion 72 of the mounting housing portion 70 in the mounting member 7. An inclined surface (tapered surface) 311 is formed to reduce the. In addition, a retaining groove 312 in which the retaining member 41 is disposed is formed on the outer peripheral surface of the outer cylinder insertion portion 31 along the circumferential direction on the tip side of the inclined surface 311.

  As shown in FIGS. 6A and 6B, the inner cylinder member 2 and the outer cylinder member 3 are configured to be assembled. Specifically, the inner cylinder member 2 is inserted from the opening at one end of the outer cylinder member 3 into the outer cylinder member 3. The inner cylinder small diameter part 22 of the inner cylinder member 2 is press-fitted into the outer cylinder insertion part 31 of the outer cylinder member 3. Thereby, the inner cylinder member 2 is in a state of being held inside the outer cylinder member 3.

  The inner cylinder large-diameter portion 21 of the inner cylinder member 2 is disposed so as to protrude in the axial direction from one end of the outer cylinder member 3. The inner cylinder large diameter portion 21 of the inner cylinder member 2 is in contact with the outer cylinder insertion portion 31 of the outer cylinder member 3 in the axial direction. The inner cylinder main body portion 23 of the inner cylinder member 2 forms an insertion space 11 into which the tubular body 8 is inserted and disposed between the outer cylinder member 3 and a portion other than the outer cylinder insertion portion 31.

  In the retaining groove 312 of the outer cylinder insertion part 31 of the outer cylinder member 3, the outer cylinder insertion part 31 inserted and arranged inside the attachment accommodating part 70 (second accommodating part 72) of the attachment member 7 is prevented from coming off. A retaining member 41 is attached. The retaining member 41 of the present embodiment is a C ring made of a metal such as stainless steel.

  A lock ring 51 for preventing the tubular body 8 inserted and disposed in the insertion space 11 from being disposed inside the other end portion of the outer cylinder member 3 is disposed. A locking piece 511 is formed on the lock ring 51 so as to protrude in an oblique direction. The retaining piece 511 bites into the outer peripheral surface of the tubular body 8 to prevent the tubular body 8 from coming off. The lock ring 51 is made of a metal such as stainless steel.

  A cylindrical cap 52 is attached to the cap attachment portion 32 of the outer cylinder member 3. The cap 52 is provided with an opening 521 into which the tubular body 8 is inserted. A split ring 53 is disposed inside the cap 52. The split ring 53 maintains the inclination angle of the retaining piece 511 of the lock ring 51 and supports the outer peripheral surface of the tubular body 8 inserted and arranged in the insertion space 11. Further, the split ring 53 is reduced in diameter when the tubular body 8 moves in the removal direction (direction opposite to the insertion direction) to prevent the tubular body 8 from coming off. Inside the split ring 53, an insertion guide 54 for guiding the tube 8 inserted into the insertion space 11 is disposed. The insertion guide 54 is held inside the split ring 53 to prevent it from coming off.

  The cap 52, the split ring 53, and the insertion guide 54 are made of a synthetic resin (engineering plastic) such as polyacetal (POM), polyphenylene sulfide (PPS), polyphenylene amide (PPA), or polyamide (PA).

  As shown in FIG. 1, the joint 1 in a state where the inner cylinder member 2 and the outer cylinder member 3 are assembled is attached to the attachment housing portion 70 of the attachment member 7. Specifically, one end of the joint 1 in the axial direction (the end on the side of the mounting member 7) is located inside the mounting housing 70 from the opening 722 of the mounting housing 70 (second housing 72) of the mounting member 7. Inserted into.

  The inner cylinder large-diameter part 21 of the inner cylinder member 2 is inserted and arranged inside the first accommodation part 71 of the attachment accommodation part 70. The inner cylinder large diameter portion 21 abuts against the first bottom surface 711 of the first accommodating portion 71 in the axial direction. The inner cylinder small diameter portion 22 of the inner cylinder member 2 and the outer cylinder insertion portion 31 of the outer cylinder member 3 are inserted and arranged inside the second accommodation portion 72 of the attachment accommodation portion 70. The outer cylinder insertion portion 31 is in axial contact with the second bottom surface 721 of the second housing portion 72. The inner cylinder large-diameter portion 21 of the inner cylinder member 2 is disposed between the first bottom surface 711 of the first accommodating portion 71 and the outer cylinder insertion portion 31 of the outer cylinder member 3. The inner cylinder large-diameter portion 21 may be configured not to contact the first bottom surface 711 of the first accommodating portion 71. Further, the outer cylinder insertion portion 31 may not be in contact with the second bottom surface 721 of the second housing portion 72.

  The seal member 42 mounted in the water stop groove 211 of the inner cylinder large-diameter portion 21 of the inner cylinder member 2 seals between the attachment member 7 and the joint 1. The retaining member 41 is disposed in a space formed by the retaining groove 312 of the outer tube insertion portion 31 of the outer tube member 3 and the housing groove 723 of the second housing portion 72 of the mounting housing portion 70. That is, the retaining member 41 is disposed between the outer cylinder insertion portion 31 of the outer cylinder member 3 and the second accommodation portion 72 of the attachment accommodation portion 70. The retaining member 41 prevents the outer cylinder insertion portion 31 inserted and disposed inside the second housing portion 72 of the attachment housing portion 70 from slipping out.

  As shown in FIG. 2, the tubular body 8 is inserted and disposed in an insertion space 11 formed between the inner cylinder member 2 and the outer cylinder member 3 of the joint 1. Specifically, when the tubular body 8 is inserted through the opening 521 of the cap 52 and inserted, the distal end surface of the tubular body 8 comes into contact with the insertion guide 54. When the tube body 8 is further inserted, the tube body 8 is guided by the insertion guide 54 and passes inside the retaining piece 511 of the lock ring 51. When the insertion guide 54 comes into contact with the bottom of the insertion space 11 (the inner cylinder small diameter portion 22 of the inner cylinder member 2 and the outer cylinder insertion portion 31 of the outer cylinder member 3), the insertion of the tube body 8 is completed.

  In a state where the tubular body 8 is inserted and arranged in the insertion space 11, the seal member 43 mounted in the two concave grooves 231 of the inner cylinder main body portion 23 of the inner cylinder member 2 is interposed between the joint 1 and the tubular body 8. Seal. The tubular body 8 is a resin pipe. The tube 8 is made of a synthetic resin (engineering plastic) such as polyolefin (cross-linked polyethylene, polybutene, etc.).

Next, the effect in the coupling 1 and the coupling attachment structure 10 of this embodiment is demonstrated.
In the joint 1 and the joint mounting structure 10 of the present embodiment, the joint 1 having the inner cylinder member 2 (the inner cylinder small diameter portion 22, the inner cylinder large diameter portion 21) and the outer cylinder member 3 (the outer cylinder insertion portion 31) having the above-described configuration. Is inserted and arranged inside the mounting housing portion 70 (the first housing portion 71 and the second housing portion 72) of the above-described configuration of the mounting member 7. A retaining member 41 is disposed between the outer cylinder insertion portion 31 of the outer cylinder member 3 of the joint 1 and the second accommodation portion 72 of the attachment accommodation portion 70 of the attachment member 7.

  Therefore, the retaining member 41 can sufficiently prevent the outer cylinder member 3 from coming off the mounting member 7. Thereby, the inner cylinder member 2 is held inside the attachment housing portion 70 (first housing portion 71, second housing portion 72) of the attachment member 7 and the outer tube insertion portion 31 of the outer tube member 3. That is, the inner cylinder member 2 can be sufficiently held by the mounting member 7 and the outer cylinder member 3. Further, since the outer cylinder member 3 can be prevented from coming off from the attachment member 7 by the retaining member 41, the inner cylinder member 2 from coming off from the attachment member 7 can also be prevented.

  Further, the outer diameter of the inner cylinder large diameter portion 21 is smaller than the outer diameter of the outer cylinder insertion portion 31. The inner cylinder large diameter portion 21 is closer to the attachment member 7 (in the insertion direction of the joint 1) than the outer cylinder insertion portion 31 disposed outside the inner cylinder small diameter portion 22. Therefore, the movement of the inner cylinder large diameter portion 21 in the removal direction of the inner cylinder member 2 (direction opposite to the insertion direction) is restricted by the outer cylinder insertion portion 31. As a result, the effect of preventing the inner cylinder member 2 from coming off can be enhanced, and the inner cylinder member 2 can be reliably held.

  Further, as described above, the inner cylinder member 2 can be held with a simple structure. Therefore, it becomes easy to assemble the members of the attachment member 7 and the joint 1 (the inner cylinder member 2 and the outer cylinder member 3). Moreover, what is necessary is just to provide the inner cylinder member 2 with the part (inner cylinder large diameter part 21) with a large outer diameter, and the small part (inner cylinder small diameter part 22). Therefore, compared with the case where a flange is provided in the inner cylinder member 2 as in the prior art, for example, the axial size and radial size of the joint 1 (joint mounting structure 10) can be reduced.

  Further, in the joint and joint mounting structure 10 of the present embodiment, the retaining member 41 is a C-ring, and the retaining member 41 is disposed on the outer peripheral surface of the outer cylinder insertion portion 31 of the outer cylinder member 3. A concave groove 312 is formed along the circumferential direction. Therefore, the retaining member (C ring) 41 can more reliably prevent the outer cylinder member 3 from coming off. Further, the retaining groove 312 for mounting the retaining member 41 can be easily formed. Further, the retaining member 41 can be easily mounted in the retaining groove 312.

  Further, an annular seal member that stops water between the inner cylinder member 2 and the mounting housing portion 70 between the inner cylinder large diameter portion 21 of the inner cylinder member 2 and the first housing portion 71 of the mounting housing portion 70. (Water-stop member) 42 is disposed, and a water-stop groove 211 in which the seal member 42 is disposed is formed on the outer peripheral surface of the inner cylinder large-diameter portion 21 along the circumferential direction. Therefore, the seal member 42 can sufficiently stop water (seal) between the inner cylinder member 2 (joint 1) and the attachment housing portion 70 (attachment member 7). Further, the water stop groove 211 for mounting the seal member 42 can be easily formed. Further, the seal member 42 can be easily attached to the water stop groove 211.

  The joint 1 is attached to the attachment member 7 in a state in which the inner cylinder member 2 and the outer cylinder member 3 are assembled. Therefore, the operation | work which attaches the coupling 1 to the attachment member 7 becomes easy. Moreover, since the structure of the joint 1 is simple, the inner cylinder member 2 and the outer cylinder member 3 can be easily assembled.

  In the joint mounting structure 10 of the present embodiment, a cover member 73 that covers the outer peripheral surface is attached to the second housing portion 72 of the mounting housing portion 70. Therefore, for example, the diameter of the second accommodating portion 72 is increased by an external factor (heat or the like), and the outer cylinder insertion portion 31 (outer cylinder member 3) inserted and arranged inside the second accommodating portion 72 is disconnected. This can be prevented by the cover member 73 covering the outer peripheral surface of the second housing portion 72.

  The second housing portion 72 of the mounting housing portion 70 is made of an elastic resin (in this embodiment, an elastomer-blended polyphenylene sulfide (PPS)). Therefore, as in the present embodiment, the housing concave groove 723 for disposing the retaining member 41 is formed on the inner peripheral surface of the second housing portion 72, and the inside of the second housing portion 72 has an undercut shape. The second housing portion 72 can be formed by deforming the second housing portion 72 and removing the mold, so-called forced removal. In addition, when the 2nd accommodating part 72 consists of resin which has elasticity, since the 2nd accommodating part 72 becomes easy to thermally deform, the diameter expansion of the 2nd accommodating part 72 can be suppressed by providing the cover member 73.

  As described above, according to the present embodiment, the joint 1 and the joint mounting structure 10 have a simple structure, can be easily assembled and reduced in size, and can sufficiently and reliably hold the inner cylinder member 2. Can be provided.

  In the present embodiment, as shown in FIG. 6 (B), the inner cylinder member 2 and the inner cylinder member 2 are formed by press-fitting the inner cylinder small-diameter portion 22 of the inner cylinder member 2 into the outer cylinder insertion portion 31 of the outer cylinder member 3. The outer cylinder member 3 is assembled. For example, as shown in FIG. 7, an engagement claw 24 is provided on the outer peripheral surface of the inner cylinder member 2, and the engagement claw 24 is engaged with the outer cylinder member 3. Thereby, the inner cylinder member 2 and the outer cylinder member 3 may be assembled | attached. Further, the method of assembling the inner cylinder member 2 and the outer cylinder member 3 is not limited to this, and various methods can be used.

(Embodiment 2)
This embodiment is an example in which the attachment member 7 is a header as shown in FIGS. In addition, description is abbreviate | omitted about the structure and effect similar to Embodiment 1. FIG.

  As shown in the figure, the attachment member (header) 7 is configured by connecting a plurality of header pieces 74. The attachment member 7 has one inflow side tube connection part 741 into which the fluid flows in and a plurality of outflow side tube connection parts 742 through which the fluid flows out.

  In the example of FIG. 8, the attachment housing portion 70 is provided in the inflow side tube connecting portion 741 of the attachment member (header) 7. The joint 1 is attached to the attachment housing portion 70. The joint attachment structure 10 is configured in the inflow side tube connecting portion 741.

  In the example of FIG. 9, in addition to the inflow side tube connection portion 741 of the attachment member (header) 7, the attachment accommodating portions 70 are provided in each of the plurality of outflow side tube connection portions 742. A joint 1 is attached to each of the attachment accommodating portions 70. Each outflow side tube connecting portion 742 is configured with a joint mounting structure 10.

(Embodiment 3)
The present embodiment is an example in which the mounting member 7 is a screw member as shown in FIGS. In addition, description is abbreviate | omitted about the structure and effect similar to Embodiment 1. FIG.

  As shown in the figure, a male screw 75 is formed at one end of the mounting member (screw member) 7 in the axial direction. The male screw 75 is screwed into a female screw formed on a faucet device or the like (not shown). An attachment housing portion 70 is provided at the other end portion of the attachment member 7 in the axial direction. The joint 1 is attached to the attachment housing portion 70. A joint mounting structure 10 is configured at the other end of the mounting member 7.

  In FIG. 11, a water stop groove 211 is formed on the distal end surface of the inner cylinder large diameter portion 21 of the inner cylinder member 2. An annular seal member (water stop member) 42 is disposed in the water stop groove 211. By providing the water stop groove 211 on the front end surface of the inner cylinder large diameter portion 21 of the inner cylinder member 2, the axial dimension of the inner cylinder member 2 can be reduced. That is, the axial size of the joint 1 (joint mounting structure 10) can be reduced.

  In the present embodiment, the attachment member 7 is a screw member. Therefore, the joint 1 can be attached to various faucet appliances or the like via the attachment member (screw member) 7. Thereby, the versatility of the joint 1 (joint mounting structure 10) can be improved.

(Other embodiments)
It goes without saying that the present invention is not limited to the above-described embodiments, and can be implemented in various modes without departing from the present invention.

  (1) In the above-described embodiment, the stop cock, the header, and the screw member are exemplified as the attachment members. However, the attachment members are not limited to these, and other faucet devices and joints are attached. Various members and the like may be used.

  (2) In the above-described embodiment, a water stop groove for arranging a seal member (water stop member) for sealing between the mounting member and the joint is formed on the outer peripheral surface of the inner cylinder large diameter portion of the inner cylinder member. However, you may form in the internal peripheral surface of the attachment accommodating part (1st accommodating part) of an accommodating member, for example.

  (3) In the above-described embodiment, the concave groove for arranging the seal member that seals between the joint and the tube is formed on the outer peripheral surface of the inner cylinder main body portion of the inner cylinder member. You may form in the inner peripheral surface (part which faces insertion space).

  (4) In the above-described embodiment, the joint in a state where the inner cylinder member and the outer cylinder member are assembled to the attachment member is attached. For example, the inner cylinder member is attached to the attachment member, and the outer cylinder member is further attached. May be attached.

  (5) In the above-described embodiment, the main portion of the mounting member (including the mounting housing portion) is made of elastic resin. For example, the mounting housing portion is made of elastic resin, and the other portion is made of metal such as stainless steel. May be. Moreover, you may comprise the whole attachment member with another resin or metal. In addition, what is necessary is just to provide a cover member as needed, when the attachment accommodating part (especially 2nd accommodating part) is comprised with the metal.

DESCRIPTION OF SYMBOLS 1 ... Joint 10 ... Joint mounting structure 11 ... Insertion space 2 ... Inner cylinder member 21 ... Inner cylinder large diameter part 22 ... Inner cylinder small diameter part 3 ... Outer cylinder member 31 ... Outer cylinder insertion part 41 ... Detachment member 7 ... Mounting member 70 ... Mounting housing 71 ... 1st housing 72 ... 2nd housing 8 ... Tube

Claims (2)

It is arranged between the mounting member and the pipe body, and is a joint for connecting both,
The mounting member is provided with a mounting housing portion that houses and attaches the joint inside,
The mounting housing portion is provided with a first housing portion and a second housing portion that is closer to the joint than the first housing portion and has a larger inner diameter than the first housing portion,
The joint includes an inner cylinder member and an outer cylinder member that is disposed outside the inner cylinder member and forms an insertion space in which the tubular body is inserted and arranged between the inner cylinder member,
The inner cylinder member includes an inner cylinder small-diameter portion inserted and arranged inside the second housing portion, and an outer diameter larger than the inner cylinder small-diameter portion on the attachment member side than the inner cylinder small-diameter portion. An inner cylinder large-diameter portion that is inserted and arranged inside the first housing portion,
The outer cylinder member is provided with an outer cylinder insertion portion that is disposed outside the inner cylinder small diameter portion and is inserted and disposed inside the second housing portion together with the inner cylinder small diameter portion,
The outer diameter of the inner cylinder large diameter part is smaller than the outer diameter of the outer cylinder insertion part, larger than the inner diameter of the outer cylinder insertion part, and smaller than the inner diameter of the first housing part. Fitting. A joint mounting structure for mounting a joint for connecting the mounting member and the tubular body to the mounting member,
The mounting member is provided with a mounting housing portion that houses and attaches the joint inside,
The mounting housing portion is provided with a first housing portion and a second housing portion that is closer to the joint than the first housing portion and has a larger inner diameter than the first housing portion,
The joint includes an inner cylinder member and an outer cylinder member that is disposed outside the inner cylinder member and forms an insertion space in which the tubular body is inserted and arranged between the inner cylinder member,
The inner cylinder member includes an inner cylinder small-diameter portion inserted and arranged inside the second housing portion, and an outer diameter larger than the inner cylinder small-diameter portion on the attachment member side than the inner cylinder small-diameter portion. An inner cylinder large-diameter portion that is inserted and arranged inside the first housing portion,
The outer cylinder member is provided with an outer cylinder insertion portion that is disposed outside the inner cylinder small diameter portion and is inserted and disposed inside the second housing portion together with the inner cylinder small diameter portion,
The outer diameter of the inner cylinder large diameter part is smaller than the outer diameter of the outer cylinder insertion part, larger than the inner diameter of the outer cylinder insertion part, and smaller than the inner diameter of the first housing part. Fitting mounting structure.