JP2011179631A - Pipe joint with valve and valve support for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint with a valve and a valve support of the pipe joint with a valve, decreasing the number of parts to reduce the cost. <P>SOLUTION: A bent part 30F bent toward a shaft passing part 30A is formed on an intermediate part of a base 30C in the valve support 30 formed of spring steel. When the force is applied to the valve support 30 from the outer periphery side toward the inner periphery, the valve support 30 formed of spring steel is reduced in diameter due to elongation of the bent part 30F by elastic deformation. Accordingly, when the valve support 30 is thus reduced in diameter, the valve support can be moved in the axial direction of a cylinder 16 along the inner peripheral surface 16A of the cylinder 16, and also when it is enlarged in diameter, it can be locked on a locking groove of the pipe joint with a valve. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a valve joint and a valve support used for the valve joint.

  2. Description of the Related Art Conventionally, valve joints with reduced pressure loss, sufficient strength, and reduced manufacturing costs are known (see, for example, Patent Document 1). The valve joint with valve and the valve support of the valve joint have a valve having a head and a shaft in a flow path of the tube, and are fixed to the tube and support the shaft so as to be movable in the axial direction. It has a valve support and a biasing member for the head. When the fitting is released, the head is biased and abuts against the reduced diameter portion to close the flow path. Thus, both heads are separated from the reduced diameter portion so that both flow paths communicate with each other. The valve support includes a shaft passing portion that surrounds the shaft portion along the peripheral surface of the shaft portion, a bridge portion extending from both ends of the shaft passing portion to the inner peripheral surface, and a valve connected to the tip portion. And a base portion along the inner peripheral surface of the pipe joint body. In addition, the shaft passing portion, the bridge portion, and the base portion have a plate shape in which the cross-sectional direction of the flow path is thin.

JP 2009-2483 A

  However, in the valve joint with valve and the valve support of the valve joint of Patent Document 1, the valve support is supported on the inner peripheral surface of the valve joint body by the retaining ring. For this reason, a retaining ring is required, and the number of parts increases, resulting in an increase in cost.

  In view of the above facts, an object of the present invention is to obtain a valve-equipped pipe joint and a valve support for the valve-equipped pipe joint that can reduce the number of parts and reduce the cost.

  According to a first aspect of the present invention, there is provided a valve fitting according to a first aspect of the present invention, wherein a male cylindrical body whose inner peripheral surface forms a flow path, an inner peripheral surface forms a flow path, and a distal end portion of the male cylindrical body is fitted. A female cylinder, a valve provided in each of the two flow paths, and having a head part and a shaft having a smaller diameter than the head part extending from the head to the opposite side of the other cylinder, and the cylinder A shaft passing portion that is fixed to a groove formed in the inner peripheral portion of the shaft, supports the shaft portion so as to be movable in the axial direction, and surrounds the shaft portion in a plurality along the peripheral surface of the shaft portion, and these A connecting portion extending from both ends of the shaft passing portion to the inner peripheral surface, connected to both ends of the connecting portions adjacent to each other extending from the adjacent shaft passing portions; and A base portion along the inner peripheral surface, and a bent portion bent toward the shaft passing portion side at an intermediate portion of the base portion, and the outer diameter is reduced by elastic deformation. A valve support that can be shrunk, and a biasing member that is interposed between the valve support and the head and biases the head toward the other cylindrical body. In this state, the head is urged toward the other cylindrical body and comes into contact with a reduced diameter portion provided on the inner peripheral surface, and the contact causes the flow path to be blocked, and the inserted state. , The two heads press each other, and the two heads separate from the reduced diameter portion by the pressing and the two flow paths communicate with each other.

  In the pipe joint with a valve according to the first aspect, an intermediate portion of the base portion of the valve support is a bent portion bent toward the shaft passing portion, and the outer diameter of the valve support is expanded and contracted by elastic deformation. For this reason, the conventionally used latching ring is not required, and the valve support having an enlarged outer diameter can be attached to the groove formed in the inner peripheral portion of the cylindrical body. As a result, the number of parts can be reduced and the cost can be reduced.

According to a second aspect of the present invention, there is provided a valve support for a valve-equipped pipe joint, wherein the inner peripheral surface forms a flow path, the inner peripheral surface forms a flow path, and the distal end portion of the male cylindrical body is A female cylinder to be inserted, and a valve provided in each of the two flow paths, and having a head part and a shaft part having a smaller diameter than the head part extending from the head part to the opposite side of the other cylinder part, An urging member that is disposed on the opposite side of the head from the other cylinder and urges the head toward the other cylinder, and in the disengaged state, the head The portion is urged toward the other cylindrical body and comes into contact with the reduced diameter portion provided on the inner peripheral surface, and the contact closes the flow path, and in the fitted state, the both heads are Used for a valve-equipped fitting with a structure in which the two heads are separated from the reduced diameter portion and the two flow paths communicate with each other. A valve support that is fixed to a groove formed in an inner peripheral portion of the cylindrical body with the biasing member interposed between the valve and the valve so as to be movable in the axial direction of the shaft portion; There,
A plurality of shaft-passing portions that surround the shaft portion along a peripheral surface of the shaft portion, and a bridge portion that extends from both ends of the shaft-passing portion to the inner peripheral surface, respectively, are adjacent to each other. A base portion extending from the shaft passing portion and connected to both front end portions of the adjacent bridging portions and extending along the inner peripheral surface; a bent portion bent toward the shaft passing portion at an intermediate portion of the base portion; The outer diameter can be expanded and contracted by elastic deformation.

  The valve support of the valve-equipped pipe joint according to claim 2 is a bent portion in which an intermediate portion of the base portion of the valve support is bent toward the shaft passing portion, and the valve support is elastically deformed to have an outer diameter. Expands or contracts. For this reason, the conventionally used latching ring is not required, and the valve support having an enlarged outer diameter can be attached to the groove formed in the inner peripheral portion of the cylindrical body. As a result, the number of parts can be reduced and the cost can be reduced.

  As described above, the valve-equipped pipe joint according to the first aspect of the present invention can reduce the number of parts and reduce the cost.

  The valve support for a valve-equipped pipe joint according to claim 2 can reduce the number of parts and reduce the cost.

It is a top view which shows the valve support tool which concerns on one Embodiment of this invention. It is a front view which shows the valve support which concerns on one Embodiment of this invention. It is a top view which shows the deformation | transformation state of the valve support tool which concerns on one Embodiment of this invention. It is a top view which shows the pipe joint with valve which concerns on one Embodiment of this invention. It is a top view which shows the valve joint with a valve support which concerns on one Embodiment of this invention in a deformation | transformation state. It is a half sectional view showing the state after connection of the pipe joint with valve concerning one embodiment of the present invention.

  Hereinafter, with reference to FIGS. 1-6, the valve support of a valve fitting and valve fitting which concerns on embodiment of this invention are demonstrated.

(Fitting with valve)
As shown in FIG. 6, the valve-equipped pipe joint 10 of this embodiment is configured by a combination of a cylindrical male joint 12 called a nose and a cylindrical female joint 14 called a body. The male joint 12 has a cylindrical male cylinder body 16 called a nose body, and an inner peripheral surface 16A of the male cylinder body 16 forms a flow path L1. Similarly, the female joint 14 has a cylindrical female cylinder 18 called a body body, and an inner peripheral surface 18A of the female cylinder 18 forms a flow path L2. The male cylindrical body 16 and the female cylindrical body 18 thus configured are, for example, screwed while fitting the distal end portion 16B of the male cylindrical body 16 into the opening formed by the inner peripheral surface 18B of the distal end portion of the female cylindrical body 18. Alternatively, it can be fixed and connected by an appropriate method such as using a connecting mechanism 20 as shown in the figure.

  Further, the male joint 12 and the female joint 14 are each provided with a valve 26 called a poppet valve or the like in the flow paths L1 and L2. These valves 26 include a tapered (conical) head portion 26A referred to as a poppet and the like, and a head portion 26A extending from the head portion 26A to the side opposite to the other cylinders 16 and 18, that is, the proximal end side. And a shaft portion 26B having a smaller diameter.

  The other cylinders 16, 18 mean the female cylinder 18 in the valve 26 provided in the flow path L1, and the male cylinder 16 in the valve 26 provided in the flow path L2. Moreover, the connection method of the male joint 12 and the female joint 14 is not specifically limited, For example, the male joint 12 and the female joint 14 can be fixed and connected by screwing.

  However, in this embodiment, from the viewpoint of easy connection, a method of fixing and connecting using the connecting mechanism 20 is adopted. The connecting mechanism 20 has a connecting cylinder 32 called a collar or the like provided coaxially and circumscribed at the tip of the female cylinder 18. The connecting cylinder 32 is thick at the distal end and thin at the proximal end, and a biasing member 34 made of a coiled spring or the like is provided between the inner peripheral surface of the thin portion and the outer peripheral surface of the female cylinder 18. Intervened. The urging member 34 is engaged with a step portion between the thick portion and the thin portion of the connecting cylinder 32 and urges the connecting cylinder 32 toward the distal end side. However, a projecting member 36 composed of an annular ring, a plurality of ball members, or the like is fitted on the outer peripheral surface of the distal end portion of the female cylinder 18 so as to protrude from the outer peripheral surface. Therefore, when the thick part of the connecting cylinder 32 is engaged with the projecting member 36, the movement of the connecting cylinder 32 to the distal end side due to the biasing is restricted.

  On the other hand, the coupling mechanism 20 has a ball member 40, and the ball member 40 is disposed in a hole 42 formed at the tip of the female cylinder 18. The ball member 40 is usually covered by the inner peripheral surface of the thick portion of the connecting cylinder 32 and is prevented from moving outward. Further, the inner diameter of the hole 42 is smaller than the diameter of the ball member 40, and the ball member 40 becomes immovable in a state of protruding from the opening of the distal inner peripheral surface 18 </ b> B of the female cylinder 18. Yes. Note that a plurality of ball members 40 and holes 42 according to the present embodiment are provided at appropriate intervals in the circumferential direction of the female cylinder 18.

  Further, the male joint 12 and the female joint 14 are provided with urging members 52 formed of coiled springs or the like in the flow paths L1 and L2. These urging members 52 are interposed between the valve support 30 and the bottom surface (base end side surface) of the head portion 26A of the valve 26, and circumscribe the shaft portion 26B. Accordingly, the head portion 26 </ b> A of the valve 26 is urged toward the other cylinder side by the urging member 52. And by this energization, in the state where tip part 16C of male cylinder body 16 is not inserted in the opening of inner peripheral surface 18B of tip part of female cylinder body 18 (state where insertion was removed), flow paths L1 and L2 Is closed. More specifically, the male cylindrical body 16 and the inner peripheral surfaces 16A and 18A of the female cylindrical body 18 that form the flow paths L1 and L2 have reduced diameter portions 16C and 18C that protrude axially (inward). Is provided. When the head portion 26A of the valve 26 is urged toward the other cylindrical body and moves to the tip end side, the inner peripheral surfaces of the reduced diameter portions 16C and 18C come into contact with the tapered surface of the head portion 26A. The flow paths L1 and L2 are blocked.

  Further, when the male joint 12 and the female joint 14 are connected using the connecting mechanism 20, first, the connecting cylinder 32 is moved (slid) to the base end side so that the ball member 40 can be moved outward. . Next, in this state, the distal end portion 16B of the male cylindrical body 16 is fitted into an opening formed by the distal end portion inner peripheral surface 18B of the female cylindrical body 18. At the time of this insertion, since the ball member 40 can move outward, the ball member 40 does not hinder the insertion. By this insertion, the distal end surface of the reduced diameter portion 16C formed on the inner peripheral surface 12A of the male joint 12 and the distal end surface of the reduced diameter portion 18C formed on the inner peripheral surface 18A of the female cylinder 18 are in contact with each other. As a result, the ball member 40 is fitted into the recess 43 formed at the tip 16B of the male cylinder 16. In this state, if the movement of the connecting cylinder 32 to the proximal end is stopped, the connecting cylinder 32 is moved to the distal end side by the urging member 34, covers the ball member 40, and the outside of the ball member 40. The movement to the direction is made impossible. In this way, the ball member 40 and the recess 43 are engaged with each other, the male joint 12 and the female joint 14 are fixed, and the connection is completed.

  An annular groove 44 is formed along the circumferential direction on the inner peripheral surface 18B of the distal end portion of the female cylindrical body 18, and a sealing material 46 made of an O-ring or the like is embedded in the annular groove 44. As a result, in the inserted state, the inner peripheral surface of the seal member 46 and the outer peripheral surface of the distal end portion 16B of the male cylindrical body 16 abut, and the outer peripheral surface of the distal end portion 16B of the male cylindrical body 16 and the female cylindrical body 18 The fluid is prevented from leaking from the tip inner peripheral surface 18B.

  Note that, in a state where the distal end portion 16B of the male cylindrical body 16 is fitted into the opening of the inner peripheral surface 18B of the distal end portion of the female cylindrical body 18, both the flow paths L1 and L2 are in communication with each other. More specifically, the both head valves 26 and 26 are pressed against each other, and the two heads 26A and 26A are separated from the reduced diameter portions 16C and 18C by the pressing, so that both the flow paths L1 and L2 communicate with each other.

  On the other hand, in a state where the distal end portion 16B of the male cylindrical body 16 is not fitted into the opening of the inner peripheral surface 18B of the distal end portion of the female cylindrical body 18, the inner peripheral surfaces of the reduced diameter portions 16C and 18C are urged by the biasing member 52. And the taper surface of the head portion 26A come into contact with each other, and the flow paths L1 and L2 are blocked by this contact.

  In the present embodiment, an annular groove is formed along the circumferential direction on the tapered surface of the head portion 26A in order to make the flow paths L1, L2 more completely closed, and a seal is formed in the annular groove. A material 48 is embedded. The sealing material 48 can be formed by, for example, an O-ring, or can be formed by baking a rubber material as disclosed in JP-A-2006-105285.

  In the present embodiment, the rectifying ring 50 is provided on the base end side of the head portion 26A. The rectifying ring 50 has a bottom surface in a conical shape having substantially the same diameter as the bottom surface of the head portion 26A, and a through hole is formed in the axial center portion. For example, when the rectifying ring 50 is disposed in the flow path L2, the bottom surface is oriented to face the bottom surface of the head portion 26A, and the inside of the through hole formed in the axial center portion is attached to the shaft portion 26B of the valve 26. The biasing member 52 is allowed to pass. With the arrangement of the rectifying ring 50, turbulent flow or the like does not occur on the proximal end side of the head portion 26A, so that pressure loss is reduced. In disposing the rectifying ring 50, for example, JP-A-8-320092 can be referred to.

  In the present embodiment, the valve support 30 called a poppet guide is provided in the flow paths L 1 and L 2 of the male joint 12 and the female joint 14, and the valve support 30 supports the valve 26.

(Valve support)
Next, the valve support 30 of this embodiment will be described. In addition, the valve support 30 can be provided with the same form in both the flow path L1 and the flow path L2, and the case where it is provided in the flow path L1 will be described below as an example.

  As shown in FIG. 1, the valve support 30 is made of an elastically deformable material, for example, spring steel. The valve support 30 is mainly composed of a shaft passing part 30A, a bridge part 30B, a base part 30C, and a bent part 30F. It is configured. 30 A of axial parts are the shapes in alignment with the surrounding surface of the axial part 26B which comprises the valve 26 with respect to the cross-sectional direction of the flow path L1, for example, the axial part 26B is made into the substantially circular cross section, and in this embodiment. It has an arc shape. Further, two shaft passing portions 30A of the present embodiment are provided so as to face each other, and the shaft portion 26B is enclosed by these two. Accordingly, the shaft portion 26B of the valve 26 is supported by the shaft passing portion 30A of the valve support 30 so as to be movable in the axial direction. On the other hand, the extending portion 30B extends from both end portions 30D of the shaft passing portion 30A to the inner peripheral surface 16A of the cylindrical body 16, and is particularly straight in the present embodiment. Further, the base portion 30C is connected to the distal end portion 30E of the adjacent bridging portions 30B extending from the mutually adjacent shaft passing portions 30A, and the shape along the inner peripheral surface 16A of the cylindrical body 16, that is, the inner peripheral surface 16A is formed. In the present embodiment having a substantially circular cross section, it has an arc shape. In this way, the connecting portion 30B is connected to the shaft portion 30A and the base portion 30C, so that the force received by the shaft portion 30A from the shaft portion 26B is the shaft portion 30A and further the inner peripheral surface 16A of the cylindrical body 16. It has come to be transmitted to. Accordingly, the force from the shaft portion 26B is transmitted more directly to the inner peripheral surface 16A. If the force is not directly transmitted, even if the moving direction of the shaft portion 26B is tilted with respect to the axial direction, it is not transmitted to the inner peripheral surface 16A, and the tilted movement may not be eliminated.

  Moreover, it is preferable that the bridge | crossover part 30B is extended in the radial direction of the flow path L1, and is extended especially linearly. This also has the effect that the material cost is reduced and the pressure loss is further reduced when the span 30B is linear. Further, from the viewpoint of the stability of the valve support 30, it is preferable that the length of the base portion 30 </ b> C is long. The length of the base portion 30C is proportional to the opening angle θ1 of the transfer portion 30B connected to one base portion 30C. Therefore, when the opening angle θ1 is increased, the valve support 30 is stabilized, but on the other hand, the material cost and the pressure loss are also increased. Therefore, from the viewpoint of these balances, for example, the opening angle θ1 is preferably 15 to 180 °, and more preferably 90 ° as in the illustrated example.

  The bent portion 30F is bent toward the shaft passing portion 30A at the intermediate portion of the base portion 30C of the valve support 30 and is bent in a V shape. Therefore, as shown in FIG. 3, when a force acts on the valve support 30 from the outer peripheral side to the inner peripheral direction (the direction of arrow A in FIG. 3), the valve support 30 made of spring steel is elastically deformed. Then, as indicated by the solid line from the two-dot chain line state, the bent portion 30F extends, and the outer diameter of the valve support 30 is reduced from D1 to D2.

  On the other hand, when the force is released from the outer peripheral side acting on the valve support 30 to the inner peripheral direction (the direction of arrow A in FIG. 3), the valve support 30 changes from the deformed shape shown by the solid line in FIG. The outer shape of the valve support 30 is expanded from D2 to D1.

  Therefore, as shown in FIG. 5, the valve support 30 is movable in the axial direction of the cylinder 16 along the inner peripheral surface 16 </ b> A of the cylinder 16 by reducing the diameter. As shown in FIG. 4, the valve support 30 is expanded in diameter so that the valve support 30 is latched in a retaining groove 56 as a ring-shaped groove formed on the inner peripheral surface 16 </ b> A of the cylindrical body 16 along the circumferential direction. Is done.

  The valve support 30 is fixed to the cylindrical bodies 16 and 18 so as not to move in the axial direction by the above-described latching. On the other hand, the shaft portion 26B of the valve 26 is inserted into the shaft passing portion 30A of the valve support 30, and the valve 26 is supported by the valve support 30 so as to be movable in the axial direction. .

Next, the operation of this embodiment will be described.
In the present embodiment, a bent portion 30F bent toward the shaft passing portion 30A is formed at the intermediate portion of the base portion 30C of the valve support 30 made of spring steel, and the bent portion 30F is bent in a V shape. It has been. Therefore, as shown in FIG. 3, when a force is applied from the outer peripheral side to the inner peripheral direction (the direction of arrow A in FIG. 3), the valve support 30 made of spring steel is elastically deformed, and the two-dot chain line As indicated by the solid line from this state, the outer diameter of the valve support 30 is reduced from D1 to D2 by extending the bent portion 30F. On the other hand, when the force is released from the outer peripheral side acting on the valve support 30 to the inner peripheral direction (the direction of arrow A in FIG. 3), the valve support 30 changes from the deformed shape shown by the solid line in FIG. The outer shape of the valve support 30 is expanded from D2 to D1.

  Therefore, as shown in FIG. 5, the valve support 30 can be moved in the axial direction of the cylinder 16 along the inner peripheral surface 16A of the cylinder 16 by reducing the diameter, and as shown in FIG. Enlargement of the diameter makes it possible to engage with the engaging groove 56.

  For this reason, the conventionally used latching ring is not required, and the valve support 30 can be attached to the latching groove 56 provided on the inner peripheral surface 16A of the cylindrical body 16. As a result, the number of parts can be reduced and the cost can be reduced. Further, since the fluid flow is not obstructed by the conventional retaining ring, the pressure loss can be reduced. Moreover, the assembly | attachment and removal to the valve fitting 10 with a valve support 30 become easy.

  When the valve support 30 is removed from the retaining groove 56, a tool such as a snap ring plier is locked to the pair of bent portions 30F, and the pair of bent portions 30F are moved in the inner circumferential direction (arrow A in FIG. 3). The valve support 30 can be easily removed from the retaining groove 56 by applying a force in the direction) and reducing the outer diameter of the valve support 30 from D1 to D2.

  Moreover, in this embodiment, as shown in FIG. 1, the whole valve support 30 is made into the plate shape from which the cross-sectional direction of the flow path L1 becomes thin. Thereby, the pressure loss of the fluid passing through the flow path L1 is significantly reduced. In addition, the valve support 30 can be manufactured by bending a flat plate material, a pipe, or the like, or by cutting, thereby reducing the manufacturing cost.

  In addition, in this invention, plate shape is not limited to the state which spreads flat, ie, it is flat shape, For example, the state bent or bent in the middle is also included.

  Further, in the present embodiment, the length K1 of the valve support 30 (see FIG. 2) and the length of the retaining groove 56 (the length based on the axial direction of the shaft portion 26B, that is, the flow direction of the flow path L1). The strength of the valve support 30 (this strength includes, for example, the integrated strength of the shaft-passing portion 30A, the spanning portion 30B, and the base portion 30C, etc.) simply by lengthening the reference length. And the stability (for example, the stability with respect to the inner peripheral surface 16A and the point that the shaft portion 26B can be stably supported) can be improved as appropriate.

[Other Embodiments]
Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art. For example, the number of the extending portions 30B in the valve support 30 is not limited to four in the above embodiment, and may be other numbers such as six. Further, the material of the valve support 30 is not limited to spring steel, and may be another material that can be elastically deformed. Further, the valve joint with the valve support 30 applied thereto is not limited to the valve joint 10 according to the above embodiment.

DESCRIPTION OF SYMBOLS 10 Pipe joint with valve 12 Male joint 14 Female joint 16 Male cylinder body 16A Inner peripheral surface of male cylinder body 16B End part of male cylinder body 16C Diameter reduction part of male cylinder body 18 Female cylinder body 18A Inner peripheral surface of female cylinder body 18B Tip inner peripheral surface of female cylinder 18C Diameter reduction part of female cylinder 20 Connection mechanism 26 Valve 26A Valve head 26B Valve shaft 30 Valve support 30A Valve support tool shaft 30B Valve support tool frame Handing portion 30C Valve support base portion 30F Valve support bending portion 32 Connecting cylinder 52 Energizing member 56 Retaining groove (groove portion)

Claims (2)

A male cylinder whose inner peripheral surface forms a flow path;
A female cylinder in which an inner peripheral surface forms a flow path, and a tip of the male cylinder is inserted;
A valve provided in each of the two flow paths, and having a head portion and a shaft portion having a smaller diameter than the head portion extending from the head portion to the opposite side of the other cylindrical body;
A shaft-passing portion that is fixed to a groove formed in the inner peripheral portion of the cylindrical body, supports the shaft portion so as to be movable in the axial direction, and surrounds the shaft portion along a peripheral surface of the shaft portion. And connecting portions extending from both end portions of the shaft passing portions to the inner peripheral surface, and both end portions of the connecting portions adjacent to each other extending from the adjacent shaft passing portions. And a valve support having a base portion along the inner peripheral surface and a bent portion bent toward the shaft passing portion at an intermediate portion of the base portion, the outer diameter of which can be expanded and contracted by elastic deformation, ,
An urging member interposed between the valve support and the head to urge the head toward the other cylindrical body;
And the head is urged toward the other cylindrical body and comes into contact with a reduced diameter portion provided on the inner peripheral surface, and the contact causes the flow path to In the closed and fitted state, the two heads are pressed against each other, and the two heads are separated from the reduced diameter portion by the pressing, and the both flow passages communicate with each other. A male cylinder whose inner peripheral surface forms a flow path;
A female cylinder in which an inner peripheral surface forms a flow path, and a tip of the male cylinder is inserted;
A valve provided in each of the two flow paths, and having a head portion and a shaft portion having a smaller diameter than the head portion extending from the head portion to the opposite side of the other cylindrical body;
An urging member that is disposed on the opposite side of the head from the other cylinder and urges the head toward the other cylinder;
And the head is urged toward the other cylindrical body and comes into contact with a reduced diameter portion provided on the inner peripheral surface, and the contact causes the flow path to In the fitting state with the valve, the both heads are pressed against each other, and the two heads are separated from the reduced diameter portion by the pressing and the both flow paths communicate with each other. Used, fixed to a groove formed in the inner periphery of the cylindrical body with the biasing member interposed between the head and the valve so as to be movable in the axial direction of the shaft A valve support,
A plurality of shaft-passing portions that surround the shaft portion along a peripheral surface of the shaft portion, and a bridge portion that extends from both ends of the shaft-passing portion to the inner peripheral surface, respectively, are adjacent to each other. A base portion extending from the shaft passing portion and connected to both front end portions of the adjacent bridging portions and extending along the inner peripheral surface; a bent portion bent toward the shaft passing portion at an intermediate portion of the base portion; And a valve support for a valve-equipped pipe joint whose outer diameter can be expanded and contracted by elastic deformation.

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