JP5951395B2 - Pipe fitting components - Google Patents

Description

  The technology of the present disclosure relates to a constituent member of a pipe joint that connects pipes.

  Conventionally, as described in Patent Document 1, for example, pipe joints that connect a plurality of pipes have been widely used. The pipe joint includes, for example, a male member and a female member as its constituent members, and connects the pipe connected to the male member and the pipe connected to the female member by connecting the male member and the female member. To do. An example of the structure of such a pipe joint will be described with reference to FIG. 10 showing a cross-sectional structure of the pipe joint. FIG. 10 shows a state where the male member and the female member are connected.

  As shown in FIG. 10, the male member 110 of the pipe joint 100 includes a male outer cylinder member 111 having a proximal end portion connected to the pipe T1. Inside the male side outer cylinder member 111, a male side valve body 112 having a cylindrical shape concentric with the male side outer cylinder member 111 and a male side valve body 112 toward the tip of the male side outer cylinder member 111 are attached. An energizing spring 113 is accommodated.

  The female member 120 includes a female-side outer cylinder member 121 having a proximal end portion connected to the tube T2. Inside the female-side outer cylinder member 121, a female-side valve element 122 that is concentric with the female-side outer cylinder member 121 and a female-side valve element 122 are attached toward the tip of the female-side outer cylinder member 121. An energizing spring 123 is accommodated. In addition, a valve seat having a columnar shape in which the proximal end is fixed to the female-side outer cylinder member 121 and is passed through the cylinder of the female-side valve body 122 and has a large tip is provided inside the female-side outer cylinder member 121. The member 124 is connected.

  In a state where the male member 110 and the female member 120 are not connected, the male valve body 112 closes the male communication port that is the opening on the opposite side of the tube T1 in the male outer cylinder member 111. At this time, the valve body seal member 114 which is a seal ring attached to the outer peripheral surface of the male valve body 112 is in close contact with the inner peripheral surface of the male outer cylinder member 111 and the outer peripheral surface of the male valve body 112, The inside of the male side outer cylinder member 111 is sealed by the male side valve body 112.

  On the other hand, the female side valve body 122 closes the female side communication port which is an opening on the opposite side to the tube T <b> 2 in the female side outer cylinder member 121 with the valve seat member 124. At this time, the female valve seat seal member 125, which is a seal ring attached to the outer peripheral surface of the valve seat member 124, is in close contact with the inner peripheral surface of the female valve body 122 and the outer peripheral surface of the valve seat member 124. At the same time, the female-side seal member 126, which is a seal ring attached to the outer peripheral surface of the female-side valve body 122, is in close contact with the inner peripheral surface of the female-side outer cylinder member 121 and the outer peripheral surface of the female-side valve body 122. Thereby, the inside of the female side outer cylinder member 121 is sealed by the female side valve body 122.

  When the male member 110 and the female member 120 are connected, the front end surface of the male side outer cylinder member 111 and the front end surface of the female side valve body 122 are abutted, and the front end surface of the male side valve body 112 and the valve seat The front end surface of the member 124 is abutted. From such a state, the male outer cylinder member 111 is pushed into the female outer cylinder member 121. Accordingly, the male valve body 112 is pushed into the male outer cylinder member 111 by the pressing force of the valve seat member 124. As a result, the flow path that is inside the male-side outer cylinder member 111 and the flow path that is inside the female-side outer cylinder member 121 are connected, for example, the fluid supplied from the tube T1 to the male member 110 is It flows to the tube T2 through the female member 120.

  At this time, the male seal member 115, which is a seal ring attached to the outer peripheral surface of the male outer cylinder member 111, is in close contact with the inner peripheral surface of the female outer cylinder member 121 and the outer peripheral surface of the male outer cylinder member 111. To do. At the same time, the female valve seat seal member 125 attached to the outer peripheral surface of the female valve body 122 is in close contact with the inner peripheral surface of the female outer cylinder member 121 and the outer peripheral surface of the female valve body 122. As a result, the fluid inside the female-side outer cylinder member 121 hardly leaks to the outside through between the outer peripheral surface of the female-side valve element 122 and the inner peripheral surface of the female-side outer cylinder member 121. Further, the fluid inside the female-side outer cylinder member 121 hardly leaks to the outside through the space between the inner peripheral surface of the female-side outer cylinder member 121 and the outer peripheral surface of the male-side outer cylinder member 111.

US Pat. No. 7,469,472

  By the way, in the above-mentioned female member 120, the valve seat member 124 which is a valve seat is passed through the cylinder of the female valve body 122 having a cylindrical shape. Further, a gap through which fluid flows is provided between the inner peripheral surface of the female valve body 122 and the outer peripheral surface of the valve seat member 124. Then, the valve seat member 124 is fixed to the female side outer cylinder member 121 that guides the movement of the female side valve body 122, so that the position of the valve seat member 124 and the female side are connected via the joint with the female side outer cylinder member 121. Matching with the position of the side valve body 122 is achieved. That is, by fixing the outer peripheral surface of the valve seat member 124 to the inner peripheral surface of the female side outer cylinder member 121, the width of the gap between the female side valve body 122 and the valve seat member 124 is set to a predetermined value. The

  On the other hand, between the columnar portion passing through the female valve body 122 of the valve seat member 124 and the female outer cylinder member 121, there is a gap for moving the female valve body 122 and a gap for fluid flow. Needed. Therefore, the outer diameter of the columnar portion passing through the female valve body 122 in the valve seat member 124 is significantly smaller than the outer diameter of the fixed portion fixed to the female outer cylinder member 121. As a result, the position of the columnar portion of the valve seat member 124 is determined by a base end portion having a significantly larger outer diameter than that, and therefore, the width of the gap between the columnar portion of the valve seat member 124 and the female valve body 122. Naturally, variations occur.

  The technique of this indication aims at providing the pipe joint constituent member which can raise the accuracy of the position of the valve seat which passes in the cylinder of the valve body to the valve body which makes a cylinder shape.

Hereinafter, means for solving the above-described problems and the operation and effects thereof will be described.
One aspect of the pipe joint constituent member of the present disclosure includes a cylindrical outer cylinder member, a cylindrical valve body that moves in the outer cylinder member along the axial direction of the outer cylinder member, and the shaft. A valve seat having a columnar shape extending along the direction and passing through the cylinder of the valve body, and a clearance between the inner peripheral surface of the valve body and the outer peripheral surface of the valve seat, And an urging member that urges the valve body toward the surface. The outer cylinder member includes a cylinder-side fitting portion that is disposed in the outer cylinder member away from the inner circumferential surface of the outer cylinder member, and a part of the circumferential direction on the inner circumferential surface of the outer cylinder member. A connecting portion that connects the tube-side fitting portion, and the valve seat includes a valve seat-side fitting portion that is fitted to the tube-side fitting portion at a proximal end portion of the valve seat. And the said outer cylinder member is provided with the 1st cylinder part and the 2nd cylinder part which are mutually connected, The said cylinder side fitting part is the 1st cylinder side fitting part and 2nd cylinder which mutually fit. A side fitting portion, and the connecting portion includes a first connecting portion and a second connecting portion. The first cylinder part is disposed in the first cylinder part away from the inner peripheral surface of the first cylinder part, and the circumferential direction on the inner peripheral surface of the first cylinder part. The 1st connection part which connects a part and said 1st cylinder side fitting part is provided. The second cylinder part is disposed in the second cylinder part away from the inner peripheral surface of the second cylinder part, and the circumferential direction on the inner peripheral surface of the second cylinder part. And a second connecting portion that connects the second tube side fitting portion.

According to one aspect of the pipe joint constituent member of the present disclosure, the position of the valve seat with respect to the outer cylinder member is determined by fitting the valve seat side fitting portion and the cylinder side fitting portion. At this time, since the cylinder side fitting portion is separated from the inner circumferential surface of the outer cylinder member, in the radial direction of the outer cylinder member, according to the gap between the inner circumferential surface of the outer cylinder member and the cylinder side fitting portion. The cylinder side fitting portion is smaller than the outer peripheral surface of the outer cylinder member. As a result, if the cylinder side fitting part and the valve seat side fitting part are fitted, the base end part of the valve seat is fixed to the inner peripheral surface of the outer cylinder member. Variation in the gap between the inner peripheral surface and the outer peripheral surface of the valve seat is suppressed. Therefore, it is possible to increase the accuracy of the position of the valve seat passing through the cylinder of the valve body with respect to the cylindrical valve body.
Moreover, according to the one aspect | mode in the pipe joint structural member of this indication, the position of the 2nd cylinder part with respect to the 1st cylinder part by the 1st cylinder side fitting part and the 2nd cylinder side fitting part fitting. Is determined. Therefore, when the outer cylinder member includes the first cylinder part and the second cylinder part, the valve element is arranged in the second cylinder part even when the valve element is arranged in the first cylinder part. Even so, it is possible to increase the accuracy of the position of the valve seat passing through the cylinder of the valve body with respect to the cylindrical valve body. As a result, since the outer cylinder member is configured using the first cylinder part and the second cylinder part, the above-described effects can be obtained even when the structure of the outer cylinder member is complicated. .

In another aspect of the pipe joint constituent member of the present disclosure, the tube-side fitting portion and the valve seat-side fitting portion are fitted along the axial direction of the outer tube member.
According to another aspect of the pipe joint constituent member of the present disclosure, the valve seat side fitting portion is less likely to be displaced with respect to the cylinder side fitting portion in a direction intersecting the axial direction of the outer cylinder member. Therefore, the accuracy of the position of the valve seat extending along the axial direction is improved, particularly in the direction crossing the axial direction.

In another aspect of the pipe joint constituent member of the present disclosure, the tube side fitting portion has a columnar shape extending along the axial direction of the outer tube member, and the valve seat side fitting portion is the tube side fitting. a fitting hole to be fitted with parts.

  In order to sufficiently secure the flow path of the fluid flowing to the outer cylinder member inside the outer cylinder member, the gap between the outer cylinder member and the cylinder side fitting portion and the gap between the outer cylinder member and the valve seat are It is preferable that the predetermined interval or more. From such a viewpoint, it is preferable that the width of the tube-side fitting portion and the width of the valve seat are restricted to a predetermined range in the radial direction of the outer tube member.

  In another aspect of the pipe joint constituent member of the present disclosure, since the valve seat fitting portion is disposed around the cylinder side fitting portion, the valve is arranged in the radial direction of the outer cylinder member rather than the width of the cylinder side fitting portion. The seat is wide. Therefore, the mechanical strength of the valve seat itself is increased as compared with the configuration in which the width of the valve seat is smaller than the width of the tube-side fitting portion.

It is sectional drawing which shows the cross-section of the female member in 1st Embodiment which actualized the pipe joint structural member in this indication as a female member. It is sectional drawing of the female member in 1st Embodiment, Comprising: It is sectional drawing which shows the sectional structure orthogonal to the paper surface of FIG. It is an expanded sectional view which expands and shows a part of section structure of a female member in a 1st embodiment. It is process drawing which shows the assembly process of the female member in 1st Embodiment. It is process drawing which shows the assembly process of the female member in 1st Embodiment. It is an expanded sectional view expanding and showing a part of section structure of a female member in a 2nd embodiment which materialized a pipe joint constituent member in this indication as a female member. FIG. 6 is a cross-sectional view showing a cross-sectional structure along the line AA in FIG. 5. It is process drawing which shows the assembly process of the female member in 2nd Embodiment. It is process drawing which shows the assembly process of the female member in 2nd Embodiment. It is sectional drawing which shows the cross-section of the male member and female member after the connection in the conventional pipe joint.

[First Embodiment]
Hereinafter, an embodiment embodying the pipe joint component according to the present disclosure will be described with reference to FIGS. 1 to 5. First, the female member which is a pipe joint structural member is demonstrated with reference to FIGS. Since the female member 10 is not rotationally symmetric, the description will be made mainly with reference to FIG. 1 suitable for explaining the valve seat fixing structure, and with reference to FIG. The male member paired with the female member is the same as the conventional male member in that a valve seat is formed at one end of the outer cylinder member in which the valve body is accommodated. Therefore, the description about the structure of a male member is omitted below.

[Configuration of Female Member 10]
As shown in FIG. 1, a pipe T2 through which a fluid flows is connected to a female member 10 serving as a pipe joint constituent member. In an axial direction along the central axis C of the female member 10, an end to which the pipe T2 is connected. Is set as the base end, and the end opposite to the base end is set as the front end.

  The female member 10 includes a connection tube member 11 as a first tube portion having a cylindrical shape, and a case 12 as a second tube portion formed in a cylindrical shape and fixed to the connection tube member 11. Various synthetic resins are used as the forming material of the connecting tube member 11 and the case 12, and the connecting tube member 11 and the case 12 constitute an outer tube member 13.

  The connecting tube member 11 has a two-stage cylindrical shape, and a base end portion 11a which is a base end side cylindrical portion has a fixed portion 11b which is a front end side cylindrical portion having a larger inner diameter than the base end portion 11a. The base end portion 11a is formed integrally.

  On the inner peripheral surface of the connecting cylinder member 11, one connecting portion 11c is formed as a first connecting portion having a plate shape extending in a direction orthogonal to the paper surface of FIG. 1 at the tip of the female base end portion 11a. (See FIG. 2). The connecting portion 11c has a plate shape over the entire radial direction of the female-side base end portion 11a, and is formed integrally with the connecting tube member 11 (see FIG. 2). One outer cylinder fitting shaft portion 11e as a first tube side fitting portion is connected to a substantially center in the radial direction of the connecting portion 11c, and the outer cylinder fitting shaft portion 11e is arranged in the axial direction of the central axis C. It extends along the axial direction of the fixed portion 11b to form a multistage columnar shape.

  A plurality of fixing holes 11d penetrating from the outer peripheral surface of the fixing portion 11b to the inner peripheral surface are formed in the outer peripheral surface of the fixing portion 11b at predetermined intervals in the circumferential direction of the fixing portion 11b. On the outer peripheral surface of the case 12, an annular flange 12a projecting toward the central axis C is formed at the base end of the outer peripheral surface. An annular flange groove forming portion 12a1 extending toward the fixing portion 11b along the axial direction is formed on the fixing portion 11b side of the flange 12a. The flange groove forming portion 12a1 is formed with an annular flange groove 12a2 that is recessed radially inward from the outer peripheral surface of the flange groove forming portion 12a1. An outer cylinder seal 12b that is in close contact with the inner surface of the fixed portion 11b is sandwiched between the flange grooves 12a2.

  A plurality of connecting portions 12c serving as plate-like second connecting portions extending in a direction perpendicular to the paper surface of FIG. 1 are formed inside the annular flange 12a (see FIG. 2). The connecting portions 12c are equally arranged with a predetermined gap along the circumferential direction (see FIG. 2). A case fitting tube portion 12d as a second tube side fitting portion is connected to an inner end portion of each of the plurality of connecting portions 12c, and the case fitting tube portion 12d is in the axial direction of the central axis C. It has a cylindrical shape extending along. In the case fitting cylindrical portion 12d, a plurality of slit portions extending from the distal end in the axial direction toward the proximal end are equally arranged at predetermined intervals along the circumferential direction. The inner diameter of the case fitting cylinder part 12d is substantially the same as the outer diameter of the outer cylinder fitting shaft part 11e, and the case fitting cylinder part 12d and the outer cylinder fitting shaft part 11e have a central axis C. Has a concentric cylindrical shape. The outer tube fitting shaft portion 11e is fitted into the case fitting tube portion 12d from the base end of the case fitting tube portion 12d, and the case 12 is positioned in the radial direction with respect to the connecting tube member 11. Yes. In the present embodiment, the case fitting cylinder part 12d and the outer cylinder fitting shaft part 11e constitute a cylinder side fitting part.

  A plurality of locking projections 12d1 are formed at the tip of the case fitting cylinder part 12d with a predetermined interval in the circumferential direction of the case fitting cylinder part 12d. The outer surface of the locking projection 12d1 is a tapered surface that expands in the radial direction from the distal end to the proximal end of the locking projection 12d1.

  On the outer peripheral surface of the case 12, a plurality of fixed protrusions 12 e protruding in the radial direction from the outer surface of the case 12 are formed on the tip side of the flange 12 a. The fixed protrusions 12e are formed in the same number as the fixed holes 11d, and are formed at positions facing the fixed holes 11d. When the fixing protrusion 12e is fitted into the fixing hole 11d, the case 12 is fixed inside the fixing portion 11b, and the space surrounded by the outer peripheral surface of the case 12 and the inner peripheral surface of the connecting cylinder member 11 is outside. Sealed by the cylinder seal 12b.

  The inner peripheral surface of the case 12 includes a multistage peripheral surface expanded toward the tip, and extends from the base end of the case 12 along the axial direction from the valve body containing peripheral surface 12S1 and the valve body containing peripheral surface 12S1. An expanded seal housing peripheral surface 12S2. A groove forming member 14 having an annular shape around the central axis C is fitted into a part of the seal housing circumferential surface 12S2 at a position away from the valve body housing circumferential surface 12S1. The outer diameter of the groove forming member 14 is substantially equal to the inner diameter of the seal housing circumferential surface 12S2, and the inner diameter of the groove forming member 14 is substantially equal to the inner diameter of the valve body housing circumferential surface 12S1. And the groove | channel pinched | interposed by the level | step difference surface 12S3 which consists of a level | step difference of valve body accommodation surrounding surface 12S1 and seal accommodation surrounding surface 12S2, and the end surface of the base end side in the groove | channel formation member 14 inside seal accommodation surrounding surface 12S2 An annular seal fitting groove 12f is formed.

  A seal member 15, which is an annular seal ring with the central axis C as the center, is fitted in the seal insertion groove 12 f. The inner diameter of the seal member 15 is smaller than the inner diameter of the groove forming member 14 and the inner diameter of the valve body housing circumferential surface 12S1, and the inner edge of the seal member 15 projects inward from the seal fitting groove 12f. The seal member 15 is in close contact with the outer peripheral surface of the outer cylindrical member of the male member and the inner peripheral surface of the case 12 in a state where the female member 10 is connected to the male member.

  As shown in FIG. 3, a valve seat member 16, which is a cylindrical valve seat with the opening on the distal end side closed, is fitted on the inside of the case 12 and outside the case fitting tube portion 12 d. Has been. The valve seat member 16 has a cylindrical shape concentric with the outer tube fitting shaft portion 11e and the case fitting tube portion 12d, and extends from the base end of the case fitting tube portion 12d in the axial direction along the central axis C. It extends to the step surface 12S3. A valve seat fitting hole 16a as a valve seat side fitting portion into which the case fitting cylindrical portion 12d is fitted is formed at the base end portion of the valve seat member 16.

  Since the valve seat member 16 is disposed outside the case fitting cylindrical portion 12d, the width of the valve seat member 16 is larger than the width of the case fitting cylindrical portion 12d in the radial direction of the case 12. Therefore, the mechanical strength of the valve seat member 16 itself is increased as compared with the configuration in which the width of the valve seat member 16 is smaller than the width of the case fitting cylinder portion 12d.

  On the proximal end side of the valve seat member 16, a plurality of fixed fitting holes 16 b that penetrate from the inner peripheral surface of the valve seat member 16 to the outer peripheral surface of the valve seat member 16 are formed. The fixed fitting holes 16b are formed in the same number as the locking projections 12d1 of the case fitting cylindrical portion 12d and at positions facing the locking projections 12d1. The valve seat member 16 is positioned in the radial direction and the axial direction with respect to the connecting cylinder member 11 and the case 12 by fitting the locking projections 12d1 into the respective fixed fitting holes 16b. .

  In the valve seat member 16, a plurality of valve seat member flow holes 16c penetrating from the inner peripheral surface to the outer peripheral surface of the valve seat member 16 are formed on the distal end side of the fixed fitting hole 16b. The plurality of valve seat member flow holes 16 c are rectangular holes extending along the central axis C, and are formed at predetermined intervals in the circumferential direction of the valve seat member 16.

  On the outer peripheral surface of the valve seat member 16, a seal fitting groove 16 d that is an annular convex groove protruding from the outer peripheral surface of the valve seat member 16 toward the outer side in the radial direction is provided on the tip side of the valve seat member circulation hole 16 c. Is formed over the entire circumferential direction of the valve seat member 16.

  A valve seat seal member 17, which is a seal ring having a rectangular cross section in a plane including the axial direction of the valve seat member 16, is fitted in the seal fitting groove 16 d. The outer diameter of the valve seat seal member 17 is substantially equal to the outer diameter RFo of the groove side wall on the distal end side of the valve seat member 16 among the groove side walls constituting the seal fitting groove 16d.

  A cylindrical valve element 18 is accommodated inside the case 12 and outside the valve seat member 16 so that a part of the opening on the distal end side is closed. In addition, a coil spring 19 as an urging member that urges the valve body 18 toward the distal end of the valve seat member 16 is sandwiched between the distal end surface inside the valve body 18 and the bottom surface of the case 12. .

  The valve body 18 has an outer diameter slightly smaller than the inner diameter of the case 12 and has a cylindrical shape concentric with the case 12. At the base end of the valve body 18, a communication port 18 a that is an opening communicating with the inside of the case 12 and the inside of the valve body 18 is formed. The top wall of the valve body 18 includes an annular valve body flange 18b projecting from the outer peripheral surface of the valve body 18 toward the central axis C. The top wall of the valve body 18 is surrounded by the valve body flange 18b. A circulation hole 18c, which is a circular hole, communicates with the communication port 18a. The flow hole 18c is a multi-stage circular hole having a diameter reduced from the top surface of the valve body flange 18b toward the base end, and the inner peripheral surface of the flow hole 18c extends over the entire circumferential direction of the inner peripheral surface. A seal protrusion 18d that protrudes radially inward is formed.

  The side surface on the distal end side of the seal protrusion 18d is a seal surface 18e against which the corner portion on the proximal end side is pressed against the outer corner portion of the valve seat seal member 17. The seal surface 18e is a cylindrical surface having an inclination with respect to the central axis C, and an inclined surface in which the inner diameter gradually decreases toward the base end.

  Among the inner diameters of the flow holes 18c, the inner diameter at the top surface of the valve body flange 18b is slightly larger than the outer diameter RFo, which is the larger of the outer diameters of the groove sidewalls of the seal fitting groove 16d. It is the magnitude | size inserted along an axial direction. On the other hand, of the inner diameters of the seal surfaces 18e, the inner diameter on the base end side is slightly smaller than the outer diameter RFo which is a large diameter, and is smaller than the outer diameter RFi which is a small diameter, among the groove sidewalls of the seal insertion groove 16d. Somewhat big. In other words, the inner diameter on the base end side of the inner diameter of the seal surface 18e is large enough to be inserted into the groove side wall on the base end side having a small diameter among the groove side walls of the seal fitting groove 16d, and the valve seat seal. The size is such that the member 17 cannot be inserted.

  Then, the valve body 18 receives a force against the urging force of the coil spring 19 and moves toward the connecting cylinder member 11 from the seating position where the valve seat seal member 17 contacts the seal surface 18e. Further, when the force against the urging force of the coil spring 19 is released, the valve body 18 returns from the seating position where the valve seat seal member 17 is separated from the seal surface 18e to the seating position.

  On the outer peripheral surface of the valve body flange 18b, an annular seal insertion groove 18f is formed which is recessed from the outer peripheral surface of the valve body 18 toward the inside in the radial direction. A seal member 20 that is an annular seal ring with the center axis C as the center is fitted into the seal fitting groove 18f. The outer diameter of the seal member 20 is larger than the outer diameter of the case 12, and the seal member 20 is accommodated in the seal fitting groove 18 f so as to be in close contact with the inner peripheral surface of the case 12 and the outer peripheral surface of the valve body 18. Yes.

[Assembly process of female member 10]
Next, the process of assembling the connecting cylinder member 11, the case 12, and the valve seat member 16 constituting the female member 10 will be described with reference to FIGS.

  As shown in FIG. 4, the coil spring 19 and the valve body 18 are first accommodated in the case 12 in order. As a result, the coil spring 19 is sandwiched between the distal end surface of the valve body 18 and the bottom surface of the case 12. And the valve body 18 is urged | biased by the coil spring 19 at the front-end | tip of case 12, and the front end surface of the valve body 18 corresponds to said level | step difference surface 12S3 in an axial direction.

  Next, the valve seat member 16 moves along the axial direction of the case 12 from the distal end of the case 12 toward the proximal end. When the base end of the valve seat member 16 is in contact with the locking projection 12d1, the outer peripheral surface of the locking projection 12d1 is pushed by the inner peripheral surface of the valve seat member 16, so that the case fitting cylindrical portion 12d bends inward in the radial direction. Mu

  When the edge of the fixed fitting hole 16b reaches the base end of the locking projection 12d1, the force that deflects the case fitting cylindrical portion 12d is released, so the extending direction of the case fitting cylindrical portion 12d is again the axial direction. Returned to As a result, the case fitting cylinder portion 12d is fitted into the valve seat fitting hole 16a, and the locking projection 12d1 is fitted into the fixed fitting hole 16b. As a result, the valve seat member 16 is positioned in the radial direction and the axial direction with respect to the case 12 at a position separated from the inner peripheral surface of the case 12 in the radial direction by the connecting portion 12c.

  Since the case fitting cylindrical portion 12d is separated from the inner peripheral surface of the case 12 by the amount of the connecting portion 12c, in the radial direction of the case 12, a gap between the inner peripheral surface of the case 12 and the case fitting cylindrical portion 12d. Accordingly, the case fitting cylindrical portion 12d becomes smaller than the outer peripheral surface of the case 12.

  As a result, if the case fitting cylindrical portion 12d and the valve seat member 16 are fitted as described above, the base end portion of the valve seat member 16 is fixed to the inner peripheral surface of the case 12. Variation in the gap between the inner peripheral surface of the valve body 18 and the valve seat member 16 is suppressed. Therefore, the accuracy of the position of the valve seat member 16 with respect to the valve body 18 can be increased.

  As described above, the case fitting cylinder portion 12 d and the valve seat fitting hole 16 a are fitted along the axial direction of the case 12. That is, the case fitting cylinder portion 12d, which is a member extending in the axial direction, is fitted into the valve seat fitting hole 16a that also extends in the axial direction. Therefore, the valve seat fitting hole 16a is less likely to be displaced with respect to the case fitting cylindrical portion 12d in the direction intersecting the axial direction of the case 12. Therefore, the accuracy of the position of the valve seat member 16 extending along the axial direction is particularly improved in the direction crossing the axial direction.

  Next, as shown in FIG. 5, the connecting tube member 11 approaches the base end of the case 12 along the axial direction of the case 12. And with the movement of the connection cylinder member 11, the outer cylinder fitting shaft part 11e is inserted toward the front end from the base end of the case fitting cylinder part 12d. At the same time, the fixing protrusion 12e is fitted into the fixing hole 11d.

  Thereby, since the outer peripheral surface of the case fitting cylinder part 12d is maintained in the state pressed against the inner peripheral surface of the valve seat member 16, the case fitting cylinder part 12d does not bend inward in the radial direction. Therefore, the positions of the valve seat member 16 in the radial direction and the axial direction are less likely to change with respect to the connecting cylinder member 11 and the case 12.

  As described above, the valve seat member 16, the case 12, and the connecting cylinder member 11 are assembled by fitting the case 12 into the valve seat member 16 and then fitting the case 12 into the connecting cylinder member 11. . Therefore, compared with the structure in which these members are assembled by welding or bonding, the process of welding or bonding can be omitted, so that the assembly of these members is simplified and the cost required for the assembly is reduced. Can do.

As described above, according to the first embodiment of the pipe joint component member of the present disclosure, the effects listed below can be obtained.
(1) Since the case fitting cylindrical portion 12d away from the inner peripheral surface of the case 12 and the valve seat fitting hole 16a are fitted, the base end portion of the valve seat member 16 is the inner peripheral surface of the case 12. The variation in the gap between the inner peripheral surface of the valve body 18 and the outer peripheral surface of the valve seat member 16 is suppressed rather than being fixed to the inner periphery. Therefore, it is possible to improve the accuracy of the position of the valve seat member 16 that passes through the cylinder of the valve body 18 with respect to the cylindrical valve body 18.

  (2) In the direction intersecting with the axial direction of the case 12, it is difficult to cause the displacement of the valve seat fitting hole 16a with respect to the case fitting cylindrical portion 12d. Therefore, the accuracy of the position of the valve seat member 16 extending along the axial direction is particularly improved in the direction intersecting the axial direction.

  (3) Since the valve seat fitting hole 16a is disposed around the case fitting cylindrical portion 12d, the width of the valve seat member 16 is larger than the width of the case fitting cylindrical portion 12d in the radial direction of the case 12. Therefore, the mechanical strength of the valve seat member 16 itself is increased as compared with the configuration in which the width of the valve seat member 16 is smaller than the width of the case fitting cylinder portion 12d.

  (4) The position of the case 12 with respect to the connecting cylinder member 11 is determined by fitting the outer cylinder fitting shaft part 11e and the case fitting cylinder part 12d. Therefore, with the configuration in which the outer cylinder member 13 includes the connection cylinder member 11 and the case 12, it is possible to improve the accuracy of the position of the valve seat member 16 passing through the valve body 18 relative to the valve body 18. become. As a result, since the outer cylinder member 13 is configured using the connecting cylinder member 11 and the case 12, even if the structure of the outer cylinder member 13 is complicated, the above-described effects can be obtained. .

[Second Embodiment]
A second embodiment in which the pipe joint constituent member of the present disclosure is embodied as a female member will be described with reference to FIGS. 6 to 9. Note that the female member of the second embodiment differs from the female member of the first embodiment in the configuration used for fitting the outer tube member and the valve seat member. Therefore, in the following, such differences will be described in detail, and description of other configurations will be omitted. Note that the description of the male member paired with the female member is omitted for the same reason as in the first embodiment. Moreover, the same code | symbol is attached | subjected with respect to the structure similar to the female member 10 in 1st Embodiment to the female member shown by FIGS.

[Structure of Female Member 30]
As shown in FIG. 6, the female member 30 as the pipe joint component is the same as the first embodiment, as the connecting cylinder member 11 and the second cylinder part as the first cylinder part constituting the outer cylinder member 13. The case 12 is provided.

  On the inner peripheral surface of the connecting cylinder member 11, a plurality of cylinder-side component pieces 31 c as plate-like first connecting portions extending inward along the radial direction of the connecting cylinder member 11 at the distal end of the base end portion 11 a. However, they are equally distributed with a predetermined gap along the circumferential direction.

A plurality of fixing protrusions 31f projecting radially inward from the inner peripheral surface of the fixing portion 11b are formed at the distal end of the fixing portion 11b at predetermined intervals in the circumferential direction of the fixing portion 11b.
On the inner side of the flange 12a formed in the case 12, a plurality of case-side component pieces 32c as plate-like second connecting portions extending inward along the radial direction of the flange 12a are provided in a predetermined direction along the circumferential direction. Evenly spaced apart. The same number of case-side component pieces 32c as the cylinder-side component pieces 31c are formed. In the present embodiment, the cylinder-side component piece 31c and the case-side component piece 32c constitute a connecting portion.

  On the outer peripheral surface of the case 12, a stepped portion 32 f is formed by a surface on which the fixed protrusion 12 e is formed and a surface having a diameter smaller than that on the front surface of the fixed protrusion 12 e. The step portions 32f are formed in the same number as the fixed protrusions 31f and at positions facing the fixed protrusions 31f. The case 12 is fixed to the inside of the fixing portion 11b by fitting the fixing projection 12e into the fixing hole 11d and fitting the fixing projection 31f into the stepped portion 32f.

  A cylindrical valve seat member 36 is disposed along the center axis C of the case 12 inside the case 12. The valve seat member 36 extends in the axial direction along the central axis C from the tip-side surface of the cylinder-side component piece 31c to the step surface 12S3. At the base end of the valve seat member 36, a plurality of valve seat fitting pieces 36a are formed as valve seat side fitting portions that are sandwiched between the cylinder side constituting piece 31c and the case side constituting piece 32c in the axial direction. .

  As shown in FIG. 7, the case-side component piece 32c and the cylinder-side component piece 31c are stepped when viewed from the radial direction. The case-side component piece 32c and the cylinder-side component piece 31c are arranged at intervals in the circumferential direction, and a step-like gap is radially formed between the case-side component piece 32c and the cylinder-side component piece 31c. It is lined up. A fitting groove 30a as a cylinder-side fitting portion is formed by a gap between the case-side component piece 32c and the cylinder-side component piece 31c.

  The said valve seat fitting piece 36a has comprised the step shape seeing from radial direction like the case side structural piece 32c and the cylinder side structural piece 31c. And the valve seat fitting piece 36a is pinched | interposed into the circumferential direction by the case side structural piece and the cylinder side structural piece, and the valve seat fitting piece 36a is fitted with respect to the fitting groove 30a. Thereby, the valve seat fitting piece is positioned by the case side constituent piece 32c and the cylinder side constituent piece 31c in both the axial direction and the radial direction.

[Assembly process of female member 30]
Next, the process of assembling the connecting cylinder member 11, the case 12, and the valve seat member 36 constituting the female member 30 will be described with reference to FIGS.

  As shown in FIG. 8, similarly to the first embodiment, first, a coil spring 19 and a valve body 18 are sequentially accommodated in the case 12. Next, the valve seat member 36 moves along the axial direction of the case 12 from the distal end of the case 12 toward the proximal end. The base end of the valve seat member 36 passes through the space surrounded by the inner side surface of the case-side component piece 32c. Thereby, the surface of the front end side in the valve seat fitting piece 36a overlaps the surface of the base end side in the case side component piece 32c.

  Next, as shown in FIG. 9, the connecting cylinder member 11 approaches the proximal end of the case 12 along the axial direction of the case 12. As the connecting cylinder member 11 moves, the distal end surface of the cylinder-side component piece 31c overlaps with the proximal end surface of the valve seat fitting piece 36a. Thereby, the valve seat fitting piece 36a is fitted into the fitting groove 30a formed by the case side constituting piece 32c and the cylinder side constituting piece 31c, so that the valve seat member 36 is removed from the inner peripheral surface of the case 12. It is positioned in the radial direction and the axial direction with respect to the case 12 at a position separated in the radial direction by the amount of the case-side component piece 32c.

  Since the valve seat member 36 is positioned at a position away from the inner peripheral surface of the case 12, the base end portion of the valve seat member 36 is the inner peripheral surface of the case 12 in the radial direction of the case 12, as in the first embodiment. The variation in the gap between the inner peripheral surface of the valve body 18 and the valve seat member 36 is suppressed rather than being fixed to. Therefore, the accuracy of the position of the valve seat member 36 with respect to the valve body 18 can be increased.

  Further, the valve seat fitting piece 36a has a stepped shape that is fitted into the fitting groove 30a formed by the cylindrical side constituting piece 31c having a stepped shape like the case side constituting piece 32c having a stepped shape. Therefore, compared with the structure which has comprised these flat plate shape, the position shift of the valve seat fitting piece 36a becomes difficult to produce in both an axial direction and radial direction. Therefore, the accuracy of the position of the valve seat member 36 in the axial direction and the radial direction is improved.

At the same time, the fixed projection 12e is fitted into the fixed hole 11d, and the fixed projection 31f is fitted into the step portion 32f.
Thus, the valve seat member 36, the case 12, and the connecting cylinder member 11 are sandwiched between the case 12 and the connecting cylinder member 11, and the connecting cylinder member 11 is fitted into the case 12. Can be assembled. Therefore, as in the first embodiment, the process of welding or bonding can be omitted, so that the assembly of these members can be simplified and the cost required for the assembly can be reduced.

As described above, according to the second embodiment of the pipe joint component member of the present disclosure, in addition to the effects (1) and (4), the following effects can be obtained.
(5) Since each of the cylinder side component piece 31c, the case side component piece 32c, and the valve seat fitting piece 36a is stepped, the position of the valve seat fitting piece 36a in both the axial direction and the radial direction. Deviation is less likely to occur, and the accuracy of the position of the valve seat member 36 in the axial direction and the radial direction is increased.

In addition, the said embodiment can also be suitably changed and implemented as follows.
In the first embodiment, the connecting cylinder member 11 includes the outer cylinder fitting shaft portion 11e. However, the outer cylinder fitting shaft portion 11e may be omitted. In this case, the outer cylinder member of the female member 10 is constituted by the case 12.

  In the first embodiment, a tubular fitting portion is formed at each of the proximal end portion of the connecting tubular member 11 and the proximal end portion of the case 12, and these tubular shapes are formed at the proximal end portion of the valve seat member 16. A columnar fitting portion that is fitted into a double cylindrical fitting portion on which the fitting portions are stacked may be formed.

  In the first embodiment, a columnar fitting portion is formed at the base end portion of the case 12, and a cylindrical fitting portion is formed at the base end portion of the connecting tube member 11 and the base end portion of the valve seat member 16. The fitting part of the connecting cylinder member 11 and the fitting part of the valve seat member 16 may be externally fitted to the fitting part of the case 12.

  -In 1st Embodiment, each of the connection cylinder member 11, the case 12, and the valve seat member 16 is provided with the fitting part formed toward the outer side of radial direction, or inner side of radial direction, and the outer cylinder member 13 The connecting cylinder member 11 and the case 12 may be configured to be fitted along the radial direction.

-In 1st Embodiment, the structure by which case fitting cylinder part 12d is externally fitted with respect to the valve seat member 16 may be sufficient.
Although the outer cylinder member 13 is configured to include the connection cylinder member 11 and the case 12, the outer cylinder member 13 may be configured such that these members are integrally formed. In this case, the outer cylinder member may be configured to include at least one fitting portion that is fitted to the fitting portion of the valve seat member 16.

  A seal member that is in close contact with the inner peripheral surface of the case 12 and the outer peripheral surface of the valve body 18 may be attached to the inner peripheral surface of the case 12. According to such a sealing member, an effect equivalent to that of the sealing member 20 can be obtained. Therefore, these two seal members are arranged at positions where they do not interfere with each other, and these seal members are used together, thereby further suppressing the fluid from leaking to the outside of the female members 10 and 30. Alternatively, the seal member 20 can be omitted.

The position of the seal member 15 is a position that is sandwiched between the inner peripheral surface of the case 12 and the outer peripheral surface of the valve body 18 in a state where the valve body 18 reaches the valve opening position in the inner peripheral surface of the case 12. May be.
The valve seat seal member 17 may be a seal ring having a U-shaped cross section. At this time, it is preferable that the recess formed in the valve seat seal member 17 faces the base ends of the female members 10 and 30. According to such a configuration, the fluid enters the recess of the valve seat seal member 17 through the inside of the valve body 18 in a state where the female members 10 and 30 are not connected to the male member. As a result, the adhesiveness between the inner peripheral surface of the flow hole 18c and the valve seat seal member 17 is improved by the pressure of the fluid stored in the recess of the valve seat seal member 17, and as a result, the female members 10 and 30 themselves are sealed. Sexuality is enhanced.

In the valve seat member 16, the valve seat seal member 17 may be omitted, and the tip portion itself that is a part of the valve seat member 16 may have a sealing function.
A seal member may be provided on the valve body 18 between the valve seat member 16 and the valve body 18, and a seal surface may be formed on the valve seat member 16.

-The slit part does not need to be formed in case fitting cylinder part 12d.
-The pipe joint constituent member in this indication may be embodied as not only a female member but a male member. In this case, the male member includes an outer cylinder member that accommodates the valve body, a valve seat that passes through the cylinder of the valve body, and a biasing member that biases the valve body, and the outer cylinder member and the valve seat are outside. What is necessary is just the structure fitted in the position away from the internal peripheral surface of the cylinder member.

  -A pipe joint constituent member in this indication is not restricted to a member which constitutes a pipe joint provided with one male member and one female member. The pipe joint component includes a plurality of pairs of male members and female members, and a pipe joint that can connect three or more pipes by attaching a plurality of male members or female members to one member. It can also be applied to the constituent members.

  C ... central axis, T1 ... tube, T2 ... tube, RFi ... outer diameter, RFo ... outer diameter, 10 ... female member, 11 ... connecting cylinder member, 11a ... base end portion, 11b ... fixed portion, 11c ... connecting portion, 11d: fixing hole, 11e: outer cylinder fitting shaft, 12 ... case, 12a ... flange, 12b ... outer cylinder seal, 12c ... coupling part, 12d ... case fitting cylinder, 12d1 ... locking projection, 12e ... fixed Projection, 12f ... Seal insertion groove, 12S1 ... Valve body housing circumferential surface, 12S2 ... Seal housing circumferential surface, 12S3 ... Step surface, 13 ... Outer cylinder member, 14 ... Groove forming member, 15 ... Seal member, 16 ... Valve seat member , 16a ... Valve seat fitting hole, 16b ... Fixed fitting hole, 16c ... Valve seat member flow hole, 16d ... Seal fitting groove, 17 ... Valve seat seal member, 18 ... Valve body, 18a ... Communication port, 18b ... Valve Body flange, 18c ... flow hole, 18d ... seal protrusion, 18e Seal surface, 18f ... seal fitting groove, 19 ... coil spring, 20 ... seal member, 30 ... female member, 30a ... fitting groove, 13c ... cylindrical body side component piece, 31f ... fixing projection, 32c ... case side component piece, 32f ... Step part, 36 ... Valve seat member, 36a ... Valve seat fitting piece, 100 ... Fitting, 110 ... Male member, 111 ... Male outer cylinder member, 112 ... Male valve body, 113 ... Spring, 114 ... Valve Body sealing member 115 ... Male sealing member, 120 ... Female member, 121 ... Female side outer cylinder member, 122 ... Female side valve body, 123 ... Spring, 124 ... Valve seat member, 125 ... Female side valve seat sealing member, 126: Female side sealing member.

Claims (3)

A cylindrical outer cylinder member;
A cylindrical valve body that moves in the outer cylinder member along the axial direction of the outer cylinder member;
A valve seat having a columnar shape extending along the axial direction and passing through the cylinder of the valve body;
A biasing member that is disposed in a gap between the inner peripheral surface of the valve body and the outer peripheral surface of the valve seat and biases the valve body toward the tip of the valve seat;
The outer cylinder member is
A cylinder-side fitting portion disposed in the outer cylinder member apart from the inner peripheral surface of the outer cylinder member;
A connecting portion that connects a portion of the inner peripheral surface of the outer tube member in the circumferential direction and the tube-side fitting portion;
The valve seat is
A valve seat side fitting portion that fits with the tube side fitting portion is provided at the base end portion of the valve seat ,
The outer cylinder member includes a first cylinder part and a second cylinder part connected to each other,
The tube side fitting portion includes a first tube side fitting portion and a second tube side fitting portion that are fitted to each other,
The connecting portion includes a first connecting portion and a second connecting portion,
The first tube portion is
The first tube side fitting portion disposed in the first tube portion away from the inner peripheral surface of the first tube portion;
A first connecting portion that connects a part of the inner peripheral surface of the first tube portion in the circumferential direction and the first tube side fitting portion;
The second tube part is
The second tube side fitting portion disposed in the second tube portion away from the inner peripheral surface of the second tube portion;
A pipe joint constituent member provided with the 2nd connecting part which connects a part of peripheral direction in the inner peripheral surface of the 2nd cylinder part, and the 2nd cylinder side fitting part . The pipe joint component according to claim 1, wherein the tube side fitting portion and the valve seat side fitting portion are fitted along an axial direction of the outer cylinder member. The tube side fitting portion has a column shape extending along the axial direction of the outer tube member,
The valve seat side fitting section, pipe joint component according to claim 2, wherein the fitting hole is fitted with the tubular engaging portions.

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