WO2010021323A1 - プラスチック樹脂パイプ用の管継手 - Google Patents

プラスチック樹脂パイプ用の管継手 Download PDF

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Publication number
WO2010021323A1
WO2010021323A1 PCT/JP2009/064449 JP2009064449W WO2010021323A1 WO 2010021323 A1 WO2010021323 A1 WO 2010021323A1 JP 2009064449 W JP2009064449 W JP 2009064449W WO 2010021323 A1 WO2010021323 A1 WO 2010021323A1
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WO
WIPO (PCT)
Prior art keywords
pipe
ring
cap
locking
fixing ring
Prior art date
Application number
PCT/JP2009/064449
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
櫻庭高光
渡邉篤弘
Original Assignee
株式会社 テスク
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社 テスク filed Critical 株式会社 テスク
Priority to KR1020117001684A priority Critical patent/KR101267647B1/ko
Priority to CN2009801287561A priority patent/CN102105731B/zh
Publication of WO2010021323A1 publication Critical patent/WO2010021323A1/ja

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
    • F16L47/08—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket
    • F16L47/10—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket the sealing rings being maintained in place by additional means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/04—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with a swivel nut or collar engaging the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/08—Joints with sleeve or socket with additional locking means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/092—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector
    • F16L37/0926—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector with an inner support sleeve arranged within the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/092—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector
    • F16L37/0927—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector the wedge element being axially displaceable for releasing the coupling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
    • F16L47/12—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with additional locking means

Definitions

  • the present invention relates to a pipe joint for connecting a plastic resin pipe of a water supply pipe or a hot water supply pipe.
  • FIG. 11 is a pipe joint of Conventional Example 1 cited as Patent Document 1, (A) is a side sectional view before connection, and (B) is a side sectional view of the connected state. That is, the pipe joint of Conventional Example 1 (FIG. 11) includes a joint body 110, a split ring 120, and a cap nut 130. As shown in FIG. 11 (A), the joint body 110 has a threaded surface on the outer peripheral surface. The inner core portion 112 is projected from the male threaded tube portion 111 provided with a locking notch portion 113 for holding the inner peripheral surface of the plastic tube on the outer peripheral surface of the inner core portion 112 over the entire length. It is arranged.
  • the split ring 120 fitted to the outer peripheral surface of the plastic pipe P is provided with a cracked portion 121 for reducing the diameter, a protrusion 122 is provided on the inner peripheral surface, and a tapered surface portion t120 is provided on the outer end.
  • a fluororesin coating layer 123 is formed for friction reduction.
  • the cap nut 130 is provided with a female thread portion 131 for screwing onto the outer periphery of the male screw pipe portion 111 on the front inner peripheral surface, and a taper for reducing the diameter of the split ring 120 on the rear inner peripheral surface.
  • a surface portion t130 is disposed, and a fluororesin coating layer 133 is formed on the tapered surface portion t130.
  • the cap nut 130 When the plastic pipe P is connected to the joint main body 110, as shown in FIG. 11A, the cap nut 130 is fitted on the outer periphery of the connecting end of the plastic pipe P, and then the split ring 120 is fitted.
  • the connecting portion of the plastic pipe P is covered and fitted to the proximal end of the inner core portion 112 of the joint body 110, the distal end of the plastic tube is brought into contact with the proximal end of the inner core portion 112, and then the cap nut 130 is screwed forward and fastened to the joint body 110, the cap nut 130 pushes the split ring 120 to the proximal end of the inner core portion 112, and the tapered surface t133 of the cap nut 130 pushes and compresses the split ring 120.
  • the plastic pipe P is made up of the notch 113 of the inner core portion 112 located on the inner peripheral surface and the protrusion of the split ring 120 located on the outer peripheral surface. 122 is to hold clamping by the.
  • FIG. 12A and 12B are explanatory diagrams of Conventional Example 2 cited as Patent Document 2, in which FIG. 12A is a sectional view of a plastic pipe fastened state, and FIG. 12B is an enlarged view of a main part of FIG. . That is, in Conventional Example 2, as shown in FIG. 12, the inner peripheral surface recess of the joint body 210 has an O-ring 220, an auxiliary ring 230, and a reduced diameter provided with a tapered portion that reduces the diameter rearward on the outer peripheral surface.
  • Possible press rings 250 are sequentially arranged, and a locking ring 240 is housed in a recess at the front end of the press ring, and a tapered portion t260 that aligns with the tapered portion t250 of the press ring 250 is provided on the inner periphery of the front end.
  • the cap 260 is screwed into the joint main body 210.
  • the connecting end of the plastic pipe P is fitted along the inner peripheral surface of the cap and the inner peripheral surface of the joint body, and the cap 260 is screwed and fastened to the joint body 210, whereby the taper of the cap 260 is increased.
  • the pressure ring 250 advances and contracts by the cooperative action of the surface t260 and the taper surface t250 of the pressure ring 250, and the pressure ring 250 and the locking ring 240 press and fasten the outer peripheral surface of the plastic tube.
  • the O-ring 220 is pressed by the advancement of the auxiliary ring 230 by the advancement, the outer peripheral surface of the plastic tube is sealed by the radial displacement of the O-ring 220, and the outer periphery of the plastic tube P is pressed by the locking ring 240 and the pressing ring 250.
  • Lock and hold, just insert the plastic pipe into the pipe joint and turn the cap, plus Click tube is a tube fitting that can be connected with one touch.
  • the protrusion 122 on the inner peripheral surface of the split ring bites into the outer peripheral surface of the plastic pipe P due to the reduced diameter of the split ring 120 and the outer peripheral notch of the inner core portion 112 is gripped.
  • the plastic pipe is prevented from being pulled out by a cooperative action with the portion 113.
  • the plastic pipe is rotated together by the fastening action of the pipe joint. Although it can be suppressed by sliding between the fluororesin coating layers applied to the tapered surface, there is a problem in workability because the cap nut 130 and the split ring 120 are individually attached when the plastic pipe P is inserted and joined.
  • the split ring 120 is accommodated in the cap nut 130, and the cap nut 130 is temporarily screwed into the joint body and is carried to the site.
  • A The joint body 110, the split ring 120, and the cap nut 130 are disassembled.
  • B As shown in FIG. 11A, the cap nut 130 and the split ring 120 are fitted to the plastic pipe P with a space therebetween.
  • C The plastic tube P is attached to the base end of the inner core portion 112.
  • the split ring 120 is moved to the proximal end of the inner core portion 112.
  • E The cap nut 130 is attached onto the split ring 120 and screwed into the joint body 110.
  • the connection work is performed in the work steps (a) to (e), and the connection of the pipes is complicated and takes time.
  • the cap nut 130 in the pipe joint of the conventional example 1 (FIG. 11), if the cap nut 130 is properly tightened, it can be used with water hammer action (vibration action due to fluctuations in liquid pressure) and repeated thermal expansion. There is a fear that it may sag and cause water leakage and removal of the plastic tube. Further, if the cap nut 130 is over-tightened to prevent water leakage, the plastic pipe P is over-compressed by the plurality of notches 113 of the inner core portion 112 and the outer peripheral surface is the split ring ridge portion.
  • an O-ring 220, an auxiliary ring 230, a locking ring 240, and a pressing ring 250 are formed on the inner peripheral surface of the joint body 210.
  • the plastic tube P Since 240 is a state in which the posture is not controlled in the recess in the pressing ring 250, the plastic tube P is reduced in diameter so that it can be displaced between the auxiliary ring 230 that does not reduce the diameter and the pressing ring 250 that is reduced in diameter. Microscopically, it microscopically exerts a free biting action on the plastic pipe P, and the locking ring 240 has an unstable biting action and an unstable locking action on the plastic pipe P. And, firmly to the plastic tube P, not immutable and of the locking is possible.
  • the flexible plastic tube is carried into the site as a roll, it has a winding rod, and the cross section of the connecting portion for insertion into the pipe joint is deformed into an elliptical shape. Therefore, if the plastic pipe connection part is inserted into the inner diameter part of the cap 260 at random, the pipe tip collides with the O-ring 220 exposed in the inner diameter direction and fits into the inner peripheral groove of the joint body 210.
  • the O-ring 220 is provided with an action of pulling out in the inner circumferential direction, and the O-ring 220 is dropped from the insertion groove, cut or deformed, and the pipe joint to which the plastic pipe P is connected is the O-ring 220.
  • water leakage occurs or the plastic pipe P is pulled out by loosening of the locking. I'm scared.
  • the cap 260 fastening operation is performed only when the cap inner diameter portion C260 is in contact with the outer peripheral surface of the plastic pipe.
  • the tightening applies a rotational pressing force to the pressing ring 250
  • the plastic pipe P rotates with the pressing ring 250 to cause partial twisting, and the plastic pipe P is buckled or stress-strained. There is a problem that impairs its durability.
  • the present invention provides an innovative one-touch connection type plastic pipe joint that solves or improves the problems of the conventional examples 1 and 2.
  • a pipe joint for a plastic resin pipe includes a joint body 8 attached to the outer periphery of a tubular inner core 9 and a cap 3 attached to the end of the joint body 8 as shown in FIG. 1 is a pipe joint in which a plastic resin pipe 12 is covered and inserted on the inner core 9 through the cap 3 and the plastic resin pipe 12 is connected with one touch by turning the cap 3.
  • the outer peripheral surface 9c is provided with a thread surface 9S to which the joint body 8 is screwed and an O-ring 4 fitted in the locking groove 9G, and the joint body 8 has a pipe shape.
  • the inner peripheral surface 8d is provided with a screw surface 8S 'for screwing the inner core 9
  • the outer peripheral surface 8c is provided with a screw surface 8S for screwing the cap 3, and the inner peripheral surface end is outwardly provided. Equipped with a tapered surface t8 that expands in diameter
  • the cap 3 is provided with an insertion hole H3 on the rear surface 3B, a threaded surface 3S that is screwed with the threaded surface 8S of the joint body on the front surface of the inner peripheral surface, and a tapered surface t3 that is reduced in diameter outwardly on the rear surface of the inner peripheral surface.
  • the cap 3 has a tapered surface ta aligned with the tapered surface t8 of the joint body 8 at the front portion and a tapered surface tb aligned with the tapered surface t3 of the cap 3 on the outer periphery, and the rear surface 5B.
  • a fixing ring 5 having a fitting protrusion piece 5P and a slit 5G for reducing the diameter, a tapered surface tc aligned with the tapered surface t3 of the cap 3 at the rear, and a locking swash plate 7 on the front surface 6F.
  • the engagement ring 6 having a fitting notch C6 seated on the inner peripheral surface 6d and fitted in a protruding form and having a slit 6G for diameter reduction is fitted and contained, and the plastic resin pipe 12 is From the insertion hole H3 of the cap 3 to the inner core 9 and the coupling book
  • the fixing ring 5 and the locking ring 6 are clamped and integrated with the locking swash plate 7, and the diameter of the plastic resin pipe 12 is reduced.
  • each member which comprises a pipe joint is not ask
  • the joint body 8 and the inner core 9 are molded articles of polyetherimide resin (trade name: Ultem resin), and the fixing ring 5 and the locking ring 6 are molded articles of polyphenylene oxide resin (trade name: noryl resin).
  • the gap dg between the outer peripheral surface 9c of the inner core 9 and the inner peripheral surface 8d of the joint body 8 may be of a size that allows the plastic resin pipe 12 to be inserted.
  • the formation of the gap dg is as shown in FIG.
  • the joint body inner peripheral surface 8d may be smooth and may be formed by the diameter-expanded step portion d9 of the inner core outer peripheral surface 9c.
  • the joint body inner peripheral surface 8d may have a reduced diameter protruding step portion.
  • the inner core outer peripheral surface 9c may be formed as a smooth surface, or although not shown, step protrusions for forming the gap dg may be disposed from both the joint body inner peripheral surface 8d and the inner core outer peripheral surface 9c.
  • the formation of the gap dg may be appropriately selected and determined from the production surface of the pipe joint.
  • the flexible plastic resin pipe 12 employing a pipe joint is typically recyclable ethylene. Octene. It is made of copolymer (PE-RT) resin.
  • the O-ring 4 is typically a circular ring with a 1.9 mm thickness of JISB2401 nitrile rubber having excellent wear resistance and heat resistance.
  • the plastic resin pipe 12 having an outer diameter R12 having a nominal diameter of 13 mm of 17 mm and an inner diameter R12 ′ of 13 mm has a tolerance of ⁇ 0.15 mm, so the thickness is 1.9 mm.
  • the O-ring 4 may be configured to protrude 0.5 mm from the outer peripheral surface 9c of the inner core 9 having an outer diameter R9 'of 12.6 mm. Since the O-ring 4 corresponds to the tolerance of the diameter of the plastic resin pipe 12 with sufficient sealing performance, typically, two O-rings are arranged, and each O-ring 4 is within the pressing area of the fixing ring 5. Arrangement is sufficient.
  • the fixing ring 5 whose diameter is reduced integrally with the locking ring 6 is maintained in the cap 3 by being loosely fitted, and in a free state, the pipe 12 penetrating from the insertion hole H3 of the cap 3 penetrates. It should be done.
  • the front tapered surface ta, the rear tapered surface tb, and the slit 5G in the form of a split groove for diameter reduction of the fixing ring 5 are caused by the fixing ring 5 moving forward with the advancement of the cap 3.
  • the front tapered surface ta is the tapered surface t8 of the joint body 8 and the rear tapered surface tb is pressed and compressed by the tapered surface t3 of the cap 3 to press the plastic resin pipe 12 against the outer peripheral surface 9c of the inner core 9 in a watertight manner.
  • the rear surface 5 ⁇ / b> B only needs to have a fitting protruding piece 5 ⁇ / b> P having a tapered surface t ′ ⁇ b> 5 for sandwiching the locking swash plate 7 fitted to the locking ring 6.
  • the relationship between the taper surface tb of the fixing ring 5, the taper surface t3 of the cap 3 and the diameter-reducing slit 5G is such that the cap 3 is advanced and screwed into the joint body 8, and the rotation of the cap 3 becomes hard.
  • the structure in which the fixing ring 5 does not overpress the outer peripheral surface 12c of the plastic resin pipe 12, that is, the flexible plastic resin pipe 12 can be pressed against the outer peripheral surface of the inner core 9 in a watertight manner.
  • the diameter R5 ′ of the insertion hole H5 of the fixing ring 5 is 17.6 mm
  • the width of the slit 5G is 2 .5 mm.
  • the locking ring 6 may be integrated with the fixing ring 5 in a state where the locking swash plate 7 that bites into the surface of the plastic resin pipe 12 is fitted, and is fixed to the fixing ring 5 to hold the cap 3 fastened.
  • 5 has an insertion hole H6 having the same diameter as that of the insertion hole H5, and a tapered surface for forming an extension of the rear tapered surface tb of the fixing ring 5 when integrally joined to the fixing ring 5 at the outer peripheral rear part tc
  • the front surface 6F has a notch C6 into which the protruding piece 5P of the fixing ring 5 is fitted, and has a tapered surface t′6 for sandwiching the locking swash plate 7, and typically, 9A and 9B, the cross-sectional shape of the notch C6 matches the cross-sectional shape of the protruding piece 5P of the fixing ring 5, and the tapered surface t′6 that forms the lower surface of the notch C6 is The tapered surface t′5 that forms
  • the locking swash plate 7 is only required to allow the pipe 12 to be inserted and to bite into the surface of the plastic resin pipe 12 due to the reduced diameter of the locking ring 6 to prevent the pipe 12 from being pulled out. As shown in FIG. 7, it is one C-shaped elastic board. Further, the inward radial protrusion of the locking swash plate 7 from the locking ring inner peripheral surface 6d allows the plastic resin pipe 12 to be inserted and fixed in a free state before the locking ring 6 is reduced in diameter. In the tightened state integrated with the ring 5, there is a slight protrusion of 0.03 to 0.08 mm, which is typically 0.05 mm, in order to exert a locking and biting action on the outer peripheral surface 12c of the plastic resin pipe 12. It is a protrusion.
  • the engagement notch C6 of the locking ring 6 fits and holds the locking swash plate 7 and is fitted to the fitting protruding piece 5P on the rear surface of the fixing ring, so that the locking ring 6 and the fixing ring 5 are fitted.
  • the locking swash plate 7 may be integrated. If an elastic plate such as a stainless steel plate is used as the locking swash plate 7, the locking swash plate 7 is elastically reduced in diameter and chipped. By engaging with C6, the locking swash plate 7 is chipped by the resilience and seated in C6.
  • the projection angle of the locking swash plate 7 may be determined from the surface of material, fitability, etc. Typically, as shown in FIG.
  • the taper surface t′6 has a tapered surface t′6 for plate fitting, and the taper surface t′6 has the same gradient 1 (45 °) as the taper surface t′5 of the protruding piece 5P of the fixing ring 5. .
  • the plastic resin pipe 12 is connected to the pipe joint of the present invention by inserting the pipe 12 through the insertion hole H3 at the outer end (rear end) of the cap as shown in FIG.
  • the innermost surface 9c of the inner core 9 and the inner peripheral surface 8d of the joint body 8 are inserted through the gaps between the held fixing ring 5 and the locking ring 6 and the outer peripheral surface 9c of the inner core 9, and the innermost surface 8d of the joint body 8 is the innermost part.
  • the cap 3 is screwed forward on the joint body 8 just by manually inserting the cap 3 and rotating the cap 3 at the same time.
  • the locking ring 6 is pressed by the cap 3 and locked to the fixing ring 5.
  • the locking ring 6 and the fixing ring 5 are integrated, and the diameter is reduced by the cooperative action of the tapered surface t3 of the cap 3 and the tapered surface t8 of the joint body 8.
  • the inner peripheral surface 12d of the pipe 12 is At the same time, the locking swash plate 7 bites into the outer peripheral surface 12c of the pipe 12 and presses and holds the pipe 12 under a watertight pressing state. Connection fastening to the pipe joint can be performed.
  • the insertion into the pipe joint is a guide insertion in a perfect circle shape, for example, the pipe tip collides with the O-ring protrusion.
  • the tip of the pipe 12 smoothly slides on the O-ring 4 without applying a stress that causes the O-ring 4 to be elastically expanded and pulled out from the locking groove 9G. Deformation and damage do not occur.
  • the locking ring 6 including the fixing ring 5 and the locking swash plate 7 receives the rotating action of the cap 3 and is slidably rotated with respect to the outer peripheral surface 12 c of the pipe 12. It moves forward and proceeds without twisting the pipe 12.
  • the locking ring 6 is fitted to the fixing ring 5 and starts to reduce its diameter as an integrated member, and from the stage of gradually increasing the pressing friction to the outer peripheral surface 12c of the pipe 12, the front tapered surface ta and the joint Increase in pressing frictional force with the tapered surface t8 of the main body, increase in pressing frictional force on the inner peripheral surface 9c of the inner peripheral surface 9d of the pipe inner peripheral surface 12d, both side edges of the slits 5G and 6G, and the locking swash plate 7 Since the cooperative action with the increase in the locking force on the pipe outer peripheral surface 12c exceeds the rotational friction force from the cap 3 received by the rear tapered surfaces tb and tc, the fixed ring 5 and the locking ring 6 are in contact-integrated behavior. Then, the outer peripheral surface of the pipe 12 is pressed and fastened without causing the pipe 12 to rotate together.
  • the fixing ring 5 and the locking ring 6 do not rotate and are an integral member.
  • the plastic resin pipe 12 can be fastened and connected by a pipe joint without causing buckling or twisting due to co-rotation at the connecting portion.
  • the cap 3 is manually tightened until it becomes hard, the diameters of the fixing ring 5 and the locking ring 6 are reduced to the diameter-reducing slits 5G and 6G and the plastic resin pipe outer peripheral surface 12c of the locking swash plate 7.
  • the plastic resin pipe 12 is prevented from being pulled out and the water-tight press against the outer peripheral surface 9c of the inner core 9 of the pipe 12 is ensured.
  • the posture of the locking swash plate 7 is firmly controlled by the integrated clamping of the locking ring 6 and the fixing ring 5, and achieves the unchanged locking action as designed.
  • the pipe joint of the present invention is a simple one-touch connection fastening operation, but the joint portion of the plastic resin pipe 12 does not cause a co-rotation phenomenon, and the O-ring 4 is displaced and damaged.
  • it is possible to reliably hold the pipe tightly which can withstand reliable watertight pressing and repeated action of water hammer (fluid pressure fluctuation) and thermal expansion.
  • the inner core 9 includes a plurality of O-rings 4, and when the cap 3 is screwed and fastened, the tapered surface ta of the front portion of the fixing ring 5 is provided. It is preferable that the fixing ring 5 presses the plastic resin pipe 12 against the O-ring 4 by the cooperative action of the joint main body taper surface t8.
  • the plastic resin pipe inner peripheral surface 12d and the O-ring 4 group constitute a face seal, and the protruding dimension of each O-ring 4 is small.
  • the O-ring 4 has a center interval (L9 ′) of 5 mm, and each O-ring 4 is arranged in a form protruding 0.5 mm from the inner core outer peripheral surface 9c. .
  • the fixing ring 5 is integrated with the locking ring 6 so that the front-rear direction width (axial width) W5 of the inner peripheral surface 5d is combined with the inner peripheral surface width W6 (standard: 4 mm) of the locking ring 6.
  • the dimension covering the area from the arrangement area of each O-ring 4 to the tip area of the inner core 9 is preferable.
  • the fixing ring 5 has a width W5 of 17 mm, and the width Wa of the front tapered surface ta is 7 mm.
  • the width Wb of the rear tapered surface tb is 5 mm.
  • the fixing ring 5 since the fixing ring 5 is required to have a function of preventing the plastic resin pipe 12 from being pulled out (extracted), the inner peripheral surface 5d of the fixing ring 5 has, for example, friction such as an uneven surface and a screw surface. It is preferable to provide a force increasing means.
  • the fixing ring 5 is press-fitted into the conical taper surface t8 of the joint main body 8 at the front portion with respect to the plastic resin pipe 12, and the inner peripheral surface 3d of the cap 3 is the joint main body.
  • the taper surface ta that receives a guaranteed pressing force provides a sealing action to the O-ring 4, and at the rear, the taper surface tb is integrated continuously.
  • the locking ring 6 is continuously connected to the tapered surface tc, and the inner diameter 6d of the locking ring 6 and the inner circumferential surface 5d of the fixing ring 5 are pressed and fastened with an integrated diameter reduction by pressing the cap 3.
  • the fixing ring 5 is integrated with the locking ring 6 in order to provide the function and the locking operation by the engagement of the locking swash plate 7 into the pipe outer peripheral surface 12c. Guarantee
  • the O-ring 4 Since a plurality of O-rings 4 can form a sealing action surface, the O-ring 4 is arranged so that the O-ring 4 does not become an insertion-fitting trouble when the plastic resin pipe 12 is inserted into the inner core 9 by being covered. Even when the projection amount is small (standard: 0.5 mm), a complete watertight pressing action on the plastic resin pipe 12 by the fixing ring 5 can be obtained. Therefore, it is easy to insert the plastic resin pipe 12 into the pipe joint, the connection can be fastened only by manually rotating the cap 3, and there is no fear of water leakage or pulling out. It becomes a pipe joint.
  • the inner core 9, the joint body 8, and the cap 3 are preferably made of a transparent plastic resin.
  • being transparent means transparent or colored translucent, and means that the back side (inner side) component (member) can be seen through.
  • the fixing ring 5 and the locking ring 6 are also made of a translucent color that can be seen through, the pipe 12 can be seen from the outside.
  • the O-ring 4 is a member on the inner side of the plastic resin pipe, if the O-ring 4 is black, it can be visually observed from the outside through the colored plastic resin pipe 12.
  • the conventional water supply pipe and hot water supply pipe are white translucent same color, the cross-linked polyethylene pipe is translucent, and the polybutene pipe is cream color. Ethylene. Octene. If a water / hot water supply pipe made of copolymer resin is adopted, the water supply pipe is white and the hot water supply pipe is pink.
  • the fixing ring 5 has an axial width (front-rear direction width) W5 that covers the O-ring 4 region, and a plurality of fixing rings 5 are provided on the inner peripheral surface 5d. It is preferable to provide the circumferential groove 5G ′.
  • the O-rings 4 are typically arranged at two intervals of 5 mm, the inner O-ring locking grooves 9G are arranged 17 mm from the tip of the inner core 9, and the fixing ring 5 is arranged at the rear.
  • the axial dimension W5 of the fixing ring 5 (standard: 17 mm) and the width dimension W6 of the locking ring 6 (standard: 4 mm) If the combined dimension is around 20 mm, the entire area from the tip of the inner core 9 to the O-ring arrangement area can be securely tightened. If the width W5 of the fixing ring 5 is around 16 mm (standard: 17 mm), the O-ring Fastening from the arrangement area of 4 to the vicinity of the tip of the inner core 9 can be guaranteed.
  • the circumferential groove 5G ′ of the inner peripheral surface 5d only needs to have a function of holding and holding (preventing pull-out) with respect to the plastic resin pipe outer peripheral surface 12c, and the width, depth, and interval of the groove 5G ′ are as follows. It may be determined appropriately according to the target plastic resin pipe 12, but typically, as shown in FIG. 6 (C), two inner circumferential grooves having a depth of 0.3 mm and a width of 0.3 mm are provided on both sides. It is arranged 3 mm inside from 5F and the rear surface 5B.
  • the outer peripheral surface 12c of the plastic resin pipe 12 is microscopically compressed and deformed.
  • the groove 5G ′ bites into the groove 5G ′ and the gripping force of the fixing ring 5 on the resin pipe 12 increases.
  • the plastic resin pipe 12 has the inner peripheral surface 12d pressed against the plurality of protruding O-rings 4 by the pressing action of the fixing ring 5, and the outer peripheral surface 12c bites into the plurality of grooves 5G ′ and has a reduced diameter.
  • the fixing ring 5 provides the plastic resin pipe 12 with a water-tight sealing action and a pull-out prevention action by a surface action over a wide peripheral surface over the O ring 4 arrangement area. As a result, a strong water-tight press and a strong locking and holding action are achieved.
  • the fixing ring 5 has a gently inclined tapered surface ta aligned with the tapered surface t8 of the joint body 8 on the front outer periphery, and a tapered surface t3 of the cap 3 on the rear outer periphery.
  • the rear surface 5B is provided with a protruding piece 5P and a notch C5 for fitting the locking ring 6 and having the same diameter as the insertion hole H3 of the cap 3 It is preferable to provide the hole H5. In this case, typically, as shown in FIG.
  • the fixing ring 5 has an axial length W5 of 17 mm, a tapered surface ta having a length Wa of 7 mm, and a tapered surface tb having a length Wb.
  • An outer diameter R5 of the outer peripheral surface 5c of the cylindrical portion is 27.6 mm, an insertion hole having a diameter of 17.6 mm passes through the center portion, and a small width for reducing the diameter in the form of a split groove on the side surface (standard) : 2.5mm) slit 5G, and the inner circumferential surface 5d has two circumferential grooves 5G 'each having a width of 0.3 mm and a depth of 0.3 mm, 3 mm inwardly from the front surface 5F and the rear surface 5B. It is arranged in.
  • the front tapered surface ta (standard: 1/7 gradient, 7 mm length) of the fixing ring 5 is slower and longer than the rear tapered surface tb (standard: 1/4 gradient, 5 mm length).
  • the fixing ring 5 has a notch C5 for fitting the locking ring 6 on the inner side of the outer tapered surface tb and an inner side of the notch C5.
  • a fitting protruding piece 5P having a tapered surface t′5 for contacting the swash plate 7 on the inner periphery is provided.
  • the protruding piece 6P of the locking ring 6 can be inserted into the notch C5 in the rear portion of the fixing ring 5.
  • the tapered surface t′5 faces the locking swash plate 7 fitted to the locking ring 6, and the outer tapered surface tb can be continuous with the outer tapered surface tc of the locking ring 6.
  • the insertion hole H5 of the fixing ring 5 is aligned with the insertion hole H6 of the locking ring 6, and If the plastic resin pipe 12 is inserted from the rear surface 3B of the cap 3 and occupies the alignment position with the insertion hole H3, the plastic resin pipe 12 is inserted into the locking ring insertion hole H6 and the fixing ring in the free state before the diameter reduction.
  • the locking swash plate 7 fitted to the locking ring 6 has a tip edge e7 slightly protruding in the radial direction from the insertion hole H6 (inner diameter: 17.6 mm) of the locking ring 6 (standard: 0.05 mm).
  • the plastic resin pipe 12 (standard outer diameter: 17 mm) can be inserted.
  • the diameter of the insertion hole H5 of the fixing ring 5 is set to the same diameter as the diameter of the insertion hole H3 of the cap 3 together with the diameter of the insertion hole H6 of the locking ring 6, so that the fixing ring 5 Together with the locking ring 6, the necessary tightening of the plastic resin pipe 12 is achieved with the minimum necessary diameter reduction.
  • the pressing and fastening action of the fixing ring 5 to the plastic resin pipe 12 is caused by the steeply tapered surface tc of the locking ring 6 and the steeply inclined rear part of the fixing ring 5 from the steeply tapered surface t3 of the cap 3.
  • the fixing ring 5 is united and advanced together with the locking ring 6 through the taper surface tb, and the long and gently inclined front taper surface ta of the fixing ring 5 applies the pressure contact force into the joint body 8 at an early stage. Since the front tapered surface ta receives an early transmission of frictional force while gradually increasing, the fixing ring 5 and the locking ring 6 abut against the surface of the pipe 12 and receive the frictional force from the pipe outer peripheral surface 12c.
  • the fixing ring 5 is only subjected to the pressing action in the state where the rotational frictional force of the cap 3 with respect to the tapered surface tb at the rear part causes a slip together with the locking ring 6 having an integral action.
  • the joint body of the tapered surface ta having a long length (standard: 7 mm) and a gentle slope (1/7 slope) of the front portion of the fixing ring 5 even during the subsequent forward fastening operation by the rotation of the cap 3.
  • Strong frictional force with the taper surface t8 biting of the slit 5G and the groove 5G 'of the inner peripheral surface into the pipe outer peripheral surface 12c, the slit 6G of the integrated locking ring 6 and the pipe of the locking swash plate 7 Due to the biting into the outer peripheral surface 12c, the integrated fixing ring 5 and locking ring 6 co-rotate the plastic resin pipe 12 without causing twisting, and firmly press and fasten the pipe 12.
  • the proper pressure contact force that is, the cap is obtained by the cooperative action of the long tapered surface ta of the fixing ring 5 and the joint body tapered surface t8. Since the pressure can be increased gradually until the manual rotation of 3 is hardened, and the outermost periphery of the pipe joint 1 is secured by the cap 3, the fixing ring 5 is an O-ring 4 that requires the maximum pressure contact force against the plastic resin pipe 12.
  • a positive and safe seal fastening to the pipe 12 is provided by a pressing action that gradually increases to reach a predetermined pressure.
  • the plastic resin pipe 12 has a unique and reliable pressing action by the front tapered surface ta and a secondary pressing action by the rear tapered surface tb in the fixing ring 5 integrated with the locking ring 6.
  • the pressure sealing action to the O-ring 4 and the sealing action by pressure contact with the inner core outer peripheral surface 9c, and the unambiguous locking swash plate 7 due to the reduced diameter of the locking ring 6 to the outer peripheral surface 12c of the plastic resin pipe 12 The locking action prevents the pull-out by biting.
  • the pipe joint of the present invention can be provided with a sealing action and a pull-out prevention without inserting a predetermined plastic resin pipe 12 and manually rotating the cap 3 without giving a joint action to the connection pipe 12. It is possible to achieve a pull-out preventing connection with a reliable leak-proof seal that can withstand repeated water hammer and thermal expansion without damaging the plastic resin pipe 12 for connection.
  • the locking ring 6 has a steeply inclined tapered surface tc aligned with the tapered surface t3 of the cap 3 on the outer periphery of the rear portion, and the fixing ring 5 on the outer periphery of the front portion.
  • the protruding piece 6P fitted into the notch C5 is formed by the notch C6, and the locking swash plate 7 can be fitted to the notch C6 by elastic repulsion.
  • the shape of the protruding piece 6P may be determined relatively according to the shape of the notch C5 at the rear portion of the fixing ring 5, and the notch C6 is engaged with the locking swash plate 7 fitted. If the stop ring 6 abuts and integrates with the fixed ring 5, the locking swash plate 7 may have a sandwiched integrated structure between the front part of the locking ring 6 and the rear part of the fixed ring 5.
  • the locking ring 6 is typically a molded product of the same plastic material as the fixing ring 5, and as shown in FIG. 9B, the notch C 6 locks the lower tapered surface t ′ 6. If the locking swash plate 7 is disposed on the tapered surface t′6 in preparation for contacting the swash plate 7, the leading edge e7 of the locking swash plate 7 slightly protrudes from the locking ring inner peripheral surface 6d (standard: 0). .05 mm protrusion).
  • the locking swash plate 7 may be a metal plate or a plastic plate as long as it has a radius of curvature larger than the curvature radius of the cut-out C6 and exhibits elastic repulsion.
  • the locking swash plate 7 is typically a flat C-shaped ring plate having a 0.3 mm thick, 2.9 mm wide stainless steel plate with a truncated cone shape.
  • the locking ring 6 is configured such that, when the pipe joint is assembled, the locking swash plate 7 is elastically repelled if the elastic locking swash plate 7 is bent in a reduced diameter and fitted into the notch C6. Can be attached and held easily, and the assembling work is easy, and in order to connect the pipe 12 by the pipe joint, the locking ring 6 has a protruding piece 6P due to the tightening action of the cap 3, and the rear part of the fixing ring 5 is missing. As an integrated reduced diameter member of the locking ring 6 and the fixing ring 5 in a state where the locking ring 6 is integrated with the fixing ring 5 and the locking swash plate 7 is securely clamped. The diameter reducing action of the plastic resin pipe 12 by the locking swash plate 7 is ensured.
  • the fixing ring 5 has a taper on the upper surface between the outer taper surface tb and the inner taper surface t′5 at the rear surface 5B.
  • a notch C5 having a surface t5, a horizontal surface f5 on the lower surface, and a vertical side 50 at the inner end is formed, and a lower portion of the notch C5 is formed as a protruding piece 5P, and the locking ring 6 is shown in FIG.
  • a protrusion 6P for fitting into the notch C5 of the fixing ring 5 at the front surface 6F is formed by an upper tapered surface t6, a front edge vertical side 60, and a lower horizontal surface f6.
  • a notch C6 is formed below the projecting piece 6P by a tapered surface t′6 aligned with the tapered surface t′5 of the fixing ring 5, and the locking swash plate 7 is tapered to the notch C6 of the locking ring 6.
  • the locking swash plate 7 is fitted onto the surface t′6 and the taper surface t′6 is tapered. It is preferable to press and clamp at the surface t′5.
  • both the tapered surface t ′ 6 that defines the inner surface of the notch C 6 of the locking ring 6 and the inner tapered surface t ′ 5 of the fixing ring 5 are surfaces that sandwich the locking swash plate 7. Therefore, the matching tapered surfaces have the same angle (same gradient). Further, since the locking swash plate 7 is surface-fitted to the conical surface of the tapered surface t′6 and produces a diameter reducing action together with the locking ring 6, if the angle of the tapered surface t′6 increases. The reduced diameter displacement of the elastic plate having a conical section has a mismatch with the reduced diameter of the tapered surface t′6.
  • the locking swash plate The inclination angle ⁇ of the cone shape in the free state 7 may be dealt with by setting it to be smaller than the angle of the tapered surface t′6 in advance in consideration of the increase in the inclination angle due to the reduced diameter.
  • the locking swash plate 7 is typically a 0.3 mm thick stainless steel plate having a width of 2.9 mm.
  • the inner diameter da is 22 mm and the outer diameter db is as shown in FIG. 27.8 mm, open end interval 7 G is 20 mm, and a truncated cone shape with a height of 1 mm.
  • the inner diameter da is 17.5 mm.
  • the inner edge (tip) edge e7 slightly protrudes from the inner peripheral surface 6d of the locking ring 6 (standard: 0.05 mm protrusion), and has a gradient 1 (height h7 is 2 mm).
  • the arrangement angle of the locking swash plate 7, that is, the inclination gradient of the tapered surface t ′ 6 of the locking ring 6 and the tapered surface t ′ 5 of the fixing ring 5, depends on the fitting workability and the target tightening of the locking swash plate 7. Although it may be determined according to the arrival pipe, the gradient is typically 1 (45 °).
  • the locking swash plate 7 is fitted into the notch C6 of the locking ring 6 with an elastic diameter reduced, the diameter of the inclined swash plate 7 is reduced toward the front of the inner periphery of the notch C6 as shown in FIG.
  • the base end edge b7 of the locking swash plate 7 is notched and locked at the innermost position of C6 by elastic action, and the leading edge e7 is tapered to the tapered surface t'6. From the inner circumferential surface 6d of the locking ring and protrudes inward (standard: 0.05 mm) by a slight inclination along the taper surface t'6 (standard: 0.1 mm).
  • the front surface 6F of the locking ring 6 fitted with the locking swash plate 7 is opposed to the rear surface 5B of the fixing ring 5, and the locking ring 6 and the fixing ring 5 are placed in the cap 3.
  • a plastic resin pipe 12 standard outer diameter: 17 mm
  • the tip edge e7 of the locking swash plate 7 allows the pipe 12 to be inserted.
  • the protruding piece 6P of the locking ring 6 has a taper surface t6 in contact with the taper surface t5 in the notch C5 on the rear surface of the fixing ring 5, and a horizontal plane f6 is a horizontal plane.
  • the fixing ring 5 is fitted in the form of surface contact, and the notch C6 of the fixing ring 5 is fitted with the protruding piece 5P of the fixing ring 5 so as to sandwich the locking swash plate 7, and the locking ring 6 and the fixing ring are inserted.
  • 5 is integrated and operates as an integral diameter-reducing member, and receives a pressing forward action by the forward movement of the cap 3.
  • the protruding piece 6P of the locking ring 6 and the notch C5 of the fixing ring 5 are aligned and fitted, and the notch C6 of the locking ring 6 and the protruding piece of the fixing ring 5 are fitted. Since the 5P is aligned and fitted, the locking ring 6 and the fixing ring 5 are integrally subjected to a forward action and a diameter reducing action, and can be fastened and fixed without causing the plastic resin pipe 12 to rotate together.
  • the locking ring 6 at the rear part of the pipe 5 the fixing ring 5 and the locking ring 6 do not rotate around the plastic resin pipe 12, and the locked locking ring 6 and the fixing ring 5 are fitted.
  • the projecting tip edge e7 of the locking swash plate 7 that is secured and fixed in between causes the pipe 12 to be bite into the outer peripheral surface 12c of the pipe 12 to prevent the pipe 12 from being pulled out. The removal is sure and strong It can be arrested.
  • the inner core 9 and the joint body 8 are sockets having a symmetrical structure in the longitudinal direction.
  • the cap 3 is fitted from both sides, and the plastic resin pipe 12 is attached from both sides.
  • An insertion connection is preferred.
  • the joint body 8 and the inner core 9 are prepared in a symmetrical form in the longitudinal direction, and the cap 3 in which the fixing ring 5 and the locking ring 6 are fitted and enclosed is attached to the joint body 8.
  • the pipe joint can be inserted and connected to the plastic resin pipe 12 from both sides. Therefore, the symmetrical double-headed socket type pipe joint is effective as an elongated joint of the plastic resin pipe 12.
  • the joint body 8 has an elbow shape, and a plastic resin pipe 12 can be connected and fastened to a pipe joint at one end.
  • the screw surface 10S is preferable.
  • the joint body 8 may be formed by integrally forming a pipe joint structure in one half and a bent elbow pipe 10 in the other half, and the inner core 9 has a joint body as shown in FIG. What is necessary is just to prepare for the dimension corresponding to this pipe joint structure. Therefore, if the pipe joint of the present invention is adopted, the plastic resin pipe 12 can be connected to one end by a one-touch operation, and a water tap or socket (not shown) as a terminal device can be connected to the other end. It is effective for pipe construction that adopts.
  • the plastic resin pipe 12 is inserted into the gap dg between the joint body 8 and the inner core 9 along the outer periphery of the inner core 9 from the cap 3 fitted to the end of the joint body 8. 3 is simply manually screwed into the joint body 8, so that the plastic resin pipe 12 is integrated into the inner core 9 by reducing the diameter of the fixing ring 5 and the locking ring 6 having the locking swash plate 7. A strong pressure can be secured on the outer peripheral surface 9c, and the inner core 9 as the water pipe can be firmly connected in a watertight manner without fear of pulling out.
  • the insertion into the pipe joint is a covering fit into the inner core 9.
  • the flexible pipe 12 is inserted while being corrected to have a perfect circular cross section, and passes smoothly over the O-ring 4 disposed on the outer peripheral surface 9c of the inner core 9, so that the O-ring 4 is removed or damaged. Since it does not receive, the press to the outer peripheral surface 9c of the inner core 9 of the plastic resin pipe 12 by the fixing ring 5 and the locking ring 6 achieves a predetermined watertight press.
  • the rotational screwing forward action of the cap 3 to the joint body 8 is such that the fixing ring 5 having front and rear tapered surfaces ta and tb, which is reduced in diameter by the forward screwing of the cap 3, is the front side, and the tapered surface tc is the rear side.
  • the locking ring 6 fitted with the locking swash plate 7 on the front side and being interposed between the joint body 8 and the cap 3 the plastic resin pipe 12 is not twisted together.
  • the locking swash plate 7 can be firmly and watertightly fastened to the outer peripheral surface 9c of the inner core 9 and is clamped between the locking ring 6 and the fixing ring 5 to control the posture.
  • One-touch operation that can press-fit the plastic resin pipe 12 in a state where there is no fear of detachment by biting into the outer peripheral surface 12c of the plastic resin pipe 12 and tightening the cap 3 manually. Therefore, even it can counter the repeated action of water hammer effects or thermal expansion effects during the useful, rich in reliability, integrity, thereby enabling a watertight manner fastening.
  • (A) is the elements on larger scale of FIG.6 (C)
  • (B) is the elements on larger scale of FIG.7 (C).
  • It is explanatory drawing which applied this invention to the elbow type pipe joint Comprising: (A) is a vertical side view, (B) is a side view.
  • (B) is a side view.
  • (A) is a vertical side view of the state before a connection
  • (B) is a vertical side view of a connection state.
  • (B) is the elements on larger scale of (A).
  • FIG. 1A is a longitudinal sectional view of a socket-type pipe joint 1.
  • the right pipe joint is in a state where a pipe 12 is connected, and the left pipe joint is just before pipe insertion.
  • FIG. 1B is an enlarged view of a portion B in FIG. 1A
  • FIG. 1C is an enlarged view of a portion C in FIG. 1A. As shown in FIG.
  • the socket-type pipe joint 1 has a joint body 8 screwed onto the outer periphery of an inner core 9 provided with a water passage hole H9, a fixing ring 5 on the front side, and a locking swash plate 7 on the outer side.
  • the fitted locking ring 6 is screwed to the rear side, and the cap 3 including the fitting is screwed to the outer periphery of the end of the joint body 8.
  • FIG. 4A and 4B are explanatory views of the inner core 9, wherein FIG. 4A is a longitudinal side view, and FIG. 4B is a side view.
  • the inner core 9 is transparent, made of polyetherimide resin (trade name: Ultem resin), and is a pipe-shaped molded product having a general thickness of 3 mm.
  • the total length L9 is 98 mm
  • the inner diameter R9 ′′ is the water passage hole H9.
  • outer diameter R9 ′ is 12.6 mm
  • the outer periphery of the central portion of the cylinder has a bulging thick portion with a diameter R9 of 20 mm
  • the outer peripheral surface of the bulging thick portion has a length of 18 mm.
  • a step portion d9 having a height of 3.65 mm is provided from the inner core outer peripheral surface 9c to the bulging screw surface 9S. Further, a taper surface t9 having a 1/3 gradient for facilitating insertion into the plastic resin pipe 12 is attached to the outer periphery of both ends, and an O-ring is provided at an intermediate position between the step portion d9 and the tip of the outer peripheral surface 9c.
  • two locking grooves 9G having a width of 2.5 mm and a depth of 1.4 mm for inserting 4 are arranged with a distance L9 ′ of 5 mm.
  • FIG. 2A and 2B are explanatory views of the joint body, in which FIG. 2A is a longitudinal side view, FIG. 2B is an end view, and FIG. 2C is a side view.
  • the joint body 8 is a pipe-shaped molded product made of polyetherimide resin (product surface: Ultem resin) with a general thickness of 4 mm.
  • Caps 3 are provided on both sides of the outer peripheral surface 8c.
  • a screw thread 8S is arranged in a form in which a thread thread protrudes from the outer peripheral surface 8c, and a metric fine screw (JISB0207) with a short screw interval for screwing so as not to loosen, and at the center of the outer peripheral surface 8c.
  • JISB0207 metric fine screw
  • a flat surface 8f for contacting a jig (wrench or the like) that prevents the joint body 8 from rotating is arranged symmetrically on the front and back, and the inner peripheral surface 8d
  • a threaded surface 8S ′ for screwing the core 9 is arranged in a protruding form from the inner peripheral surface 8d.
  • a fitting hole H8 ′ having a length L8 ′ with which the fixing ring 5 is fitted is 7 mm is arranged in an outwardly expanded form through a stopper surface st having a stopper function,
  • the inner peripheral surface that expands outward from the fitting hole H8 ′ is defined as a tapered surface t8.
  • the tapered surface t8 was formed with a length L8 ′ of 7 mm, an inner end diameter of 21.6 mm, and an outer end diameter of 22.4 mm.
  • the dimensional relationship of the joint body 8 is that the outer diameter R8 is 26.4 mm, the total length L8 is 73 mm, the center is provided with an insertion hole H8 with a diameter R8 ′ of 19.6 mm, and the length of the inner peripheral surface 8d.
  • a screw surface 8S ′ for inner core screwing is arranged in a projecting form from the inner peripheral surface 8d over a length of 18 mm, and the screw surfaces 8S on both sides of the outer peripheral surface have a length (L8 ′) from the tip. ) 7 mm was placed and placed in a range of 12 mm in length.
  • FIG. 3A is a rear view of the cap 3, and FIG. 3B is a longitudinal side view.
  • the cap 3 is a molded product of transparent polyphenylene oxide resin (trade name: Noryl resin), and has a covered pipe shape as shown in FIG. 3 (A).
  • the protrusion 3P in the longitudinal direction is arranged in a hexagonal shape, and the lid surface of the rear surface 3B has a circular insertion hole H3 with a diameter R3 ′ of 17.6 mm for inserting the plastic resin pipe 12.
  • the inner surface of the cap 3 is provided with a fitting body fitting hole H3 ′′ having an inner diameter R3 ′′ of 28 mm, and a metric fine screw 3S for fitting the joint body 8 to the inner peripheral surface 3d slightly (standard: 1 mm) from the front surface 3F. (JISB0207) is provided over 12 mm in the front and rear, and a tapered surface t3 for contacting the tapered surface tb of the fixing ring 5 is provided inside the rear surface 3B.
  • the pipe-shaped cap 3 has a general thickness of 3.5 mm, a length L3 of 38 mm, and a diameter R3 of the cylindrical outer peripheral surface 3c of 35 mm.
  • the outer peripheral surface 3c has a width of 5 mm and a protruding height d3 of 1.
  • 5 mm lengthwise projections 3P are provided in a hexagonal shape at equal intervals
  • the diameter R3 ′ of the insertion hole H3 in the center of the rear surface 3B is 17.6 mm
  • the thread surface 3S in the front part of the inner peripheral surface 3d has a width of 12 mm. This is a metric fine thread surface with a pitch interval of 1.5 mm and a height of 0.8 mm.
  • the tapered surface t3 on the rear surface of the inner peripheral surface is a 1/4 gradient from the inner peripheral diameter (R3 ′′) of 28 mm, and the rear is 8 mm in length. It is a truncated conical surface that is reduced in diameter.
  • FIG. 5A is a front view of the O-ring
  • FIG. 5B is a vertical side view of the O-ring.
  • the O-ring 4 is a seal member that is fitted in and attached to a locking groove 9G having a width of 2.5 mm and a depth of 1.4 mm of the inner core 9, and is a cross section of a nitrile rubber (JISB2401) having excellent wear resistance and heat resistance. It is a circular ring with a cross section having a thickness W4 of 1.9 mm and an inner diameter R4 of 9.8 mm, and is colored black (colored with a stock solution).
  • FIGS. 6, 9A and 6B are explanatory views of the fixing ring 5, in which FIG. 6A is a side view, FIG. 6B is a front view, FIG. 6C is a longitudinal sectional view, and FIG. It is an enlarged view.
  • the fixing ring 5 is a molded product made of colored transparent polyphenylene oxide resin (trade name: Noryl resin), and the overall shape is as shown in FIG. 6C for inserting a plastic resin pipe 12 in the center.
  • the diameter R5 ′ is an insertion hole H5 having a diameter of 17.6 mm, the width W5 in the front-rear direction is 17 mm, and the outer peripheral surface 5c has a conical taper surface with a gradient 1/7 that expands from the front surface 5F to the central portion.
  • Ta is aligned with the tapered surface t8 of the joint body 8, and the length Wa is 7 mm.
  • a conical tapered surface tb having a gradient 1/4 expanding to the center is provided on the rear surface of the cap 3.
  • a length Wb of 5 mm is provided in a form aligned with the tapered surface t3 on the inner periphery, and a notch C5 and a protruding piece 5P for engaging a locking ring are provided on the rear surface.
  • the notch C5 and the protruding piece 5P on the rear surface 5B are formed by a tapered surface t5 inclined inward at the same gradient as the tapered surface tb of the outer peripheral surface, a vertical side 50, and a horizontal plane f5.
  • a notch C5 having a depth width WC of 2 mm is formed, and a taper surface t′5 having a width of 2.8 mm and having an inwardly decreasing diameter is formed at a gradient 1 (45 °) below the notch C5.
  • the horizontal plane f5 of the recess C5 and the tapered surface t′5 form a triangular projecting piece 5P having a width WC of 2 mm.
  • a slit (5G) having a small width (standard: 2.5 mm) in order to reduce the diameter when external pressure is applied to the fixing ring 5 is provided in a split groove shape over the entire length as shown in FIG. 6 (A).
  • the outer peripheral surface 12c of the plastic resin pipe 12 bites in due to elastic deformation (two circumferential grooves ( Standard: depth 0.3 mm, width 0.3 mm) are arranged at positions of 3 mm from the front surface 5F and 3 mm from the rear surface 5B of the inner peripheral surface 5d.
  • FIG. 7 is an explanatory view of the locking ring.
  • (B) is a rear view
  • (C) is a longitudinal sectional view
  • FIG. 9 (B) is a partially enlarged view of FIG. 7 (C).
  • the locking ring 6 is a molded product made of colored transparent polyphenylene oxide resin (product surface: Noryl resin). The overall shape of the locking ring 6 is as shown in FIG.
  • Insertion hole H6 having a diameter R ′ of 17.6 mm, a width W6 in the front-rear direction of 4 mm, an outer diameter R6 of 25.1 mm, and a half width (1 / 2 W6), the tapered surface tc, which is aligned and continuous with the tapered surface tb of the outer periphery of the rear portion of the fixed ring, is aligned with the tapered surface t5 of the notch C5 in the rear portion of the fixed ring, and is aligned with the tapered surface t6. (Standard: 2 mm).
  • the front outer peripheral taper surface t6, the tip vertical side 60, and the horizontal surface f6 on the lower surface form a protruding piece 6P extending over the half width (2 mm) of the locking ring 6, and the lower side (inner side) of the protruding piece 6P.
  • the tapered surface t′6, which is aligned with the tapered surface t′5 having the gradient 1 of the fixing ring 5, has a conical surface shape whose diameter is reduced outward, and the surface width of the tapered surface t′6 is 2.8 mm.
  • a notch C6 having a triangular cross section is formed.
  • a slit 6G having a small width (standard: 2.5 mm) for reducing the diameter is provided.
  • FIG. 1 the locking swash plate 7 is elastically fitted into the notch C6 on the front side of the locking ring 6, and FIG. , (A) is a plan view, (B) is a perspective view, and (C) is a sectional view taken along the line CC of (A).
  • the locking swash plate 7 is a C-shaped stainless steel plate having a width of 2.9 mm and a thickness of 0.3 mm. In the free state, the inner diameter da is 22 mm and the outer diameter db is 27.
  • incision interval 7 G is 20 mm
  • height h 7 is 1 mm in cross-sectional truncated cone shape, and when fitted and seated in the notch C 6 of the locking ring 6, as shown in FIG.
  • the tip edge e7 protrudes obliquely 0.1 mm from the tapered surface t′6 with a gradient 1 (45 °) at 8 mm, and the tip edge e7 protrudes 0.05 mm radially inward from the inner surface 6d of the locking ring.
  • each locking groove 9G inside the inner core 9 in a cylindrical portion having an outer diameter R9 ′ of the cylindrical outer peripheral surface 9c of 12.6 mm).
  • the black O-ring 4 (thickness 1.9 mm, inner diameter 9.8 mm) is fitted to the width 2.5 mm and depth 1.4 mm), and then the central portion of the inner peripheral surface 8 d of the socket joint body 8 is The threaded surface 9S is threadedly engaged with the threaded surface 9S at the center of the outer peripheral surface of the inner core 9 for the socket, and the pipe 12 is connected between the outer peripheral surface 9c of the inner core 9 and the inner peripheral surface 8d of the joint body cylindrical portion.
  • the gap dg to be inserted is formed and tightened. In this case, workability is good because the inner core 9 is screwed and fastened by sandwiching and holding the flat surfaces 8f on both sides arranged at the center of the joint body outer peripheral surface 8c.
  • the diameter of the locking swash plate 7 is reduced in the notch C6 having a triangular cross section of the locking ring 6, the base end edge b7 is at the innermost part of the tapered surface t'6, and the distal end edge e7 is the tapered surface. It is elastically fitted in the form of a slanted slight protrusion (standard: 0.1 mm protrusion) from t′6, and the locking ring 6 is inserted into the cap 3 as shown in the left half of FIG.
  • the fixing ring 5 is fitted in front of the locking ring 6, and the notch C5 is fitted in a form opposite to the notch C6 of the locking ring 6, and the tapered surface tc at the rear of the locking ring 6 is fixed.
  • the tapered surface tb of the rear part of the ring 5 is opposed to the tapered surface t3 of the cap 3, the tapered surface ta of the front part of the fixed ring is opposed to the inner side of the tapered surface t8 of the joint body 8, and the cap 3 is joined. Temporarily screw onto the end of the body 8.
  • the locking ring 6 and the fixing ring 5 are loosely fitted in the cap 3, and the taper surface tc at the rear part of the locking ring 6 and the taper surface tb at the rear part of the fixing ring 5 are the cap 3. Therefore, the insertion hole H3 on the rear surface of the cap 3, the insertion hole H6 of the locking ring 6 and the insertion hole H5 of the fixing ring 5 have the same diameter, and It becomes a front-rear alignment form. Then, in a state where the cap 3 is temporarily screwed into the joint body 8, the pipe body is carried into the construction site as a pipe joint.
  • a plastic resin pipe 12 As a plastic resin pipe 12, ethylene. With a nominal diameter 13A (outside diameter R12: 17 mm, inside diameter R12 ′: 13 mm) of JIS standard is used. Octene. From the insertion hole H3 (hole diameter: 17.6 mm) of the rear end (rear surface 3B) of the cap 3, the tip of the copolymer (PE-RT) resin translucent pipe 12 is inserted into the retaining ring 6 (hole diameter: 17.6 mm).
  • PE-RT copolymer
  • the fixing ring 5 (hole diameter: 17.6 mm) is penetrated, it fits with the outer periphery of the inner core 9 with a covering form, and the inside of the clearance gap dg is inserted to the step part d9.
  • the cap 3, the joint body 8, and the inner core 9 are transparent, and the locking ring 6 and the fixing ring 5 are colored and transparent, the plastic resin pipe 12 is not displaced in the O-ring 4. The state where the pipe tip is properly fitted to the innermost step d9 and the state where the locking ring 6 and the fixing ring 5 occupy the proper positions can be visually confirmed.
  • the cap 3 is rotated by hand, and is screwed forward to the joint body 8 until it feels firm.
  • the locking ring 6 included in the cap 3 is pushed forward and the protruding piece 6 ⁇ / b> P is inserted into the notch C ⁇ b> 5 of the fixing ring 5, so that the locking ring is 6 is integrated with the fixing ring 5 and the locking swash plate 7 sandwiched, and both the locking ring 6 and the fixing ring 5 are pushed by the tapered surface t3 inside the rear portion of the cap 3 to advance, and are made of plastic resin.
  • the locking ring 6 and the fixing ring 5 that have been loosely fitted to the outer periphery of the pipe 12 are integrated members, and the front side gently inclined and long taper surface ta is connected to the conical surface of the tapered surface t8 of the joint body.
  • the gradual and precise press-fitting action is caused by the sharply inclined and short taper surface tb plus tc on the rear side being subjected to the crown pressing action in which the taper surface t3 of the rear part of the cap 3 is abruptly increased.
  • Receive Decreases in diameter from the front of the grayed 5 over the rear portion of the entire length of the locking ring 6, is pressed against the outer peripheral surface 12c of the plastic resin pipe 12.
  • Slits 6G and 5G are flexible plastic trees It has an effect of biting into the outer peripheral surface 12c of the fat pipe 12, and also prevents the plastic resin pipe 12 from being pulled out from the pipe joint. That is, in the socket type pipe joint shown in FIG. 1, the pipe 12 can be connected by one-touch by simply inserting the pipe 12 from both sides and rotationally tightening the cap 3, guaranteeing watertight pressing and pull-out prevention retention. A possible pipe connection can be achieved.
  • FIG. 10A and 10B are explanatory views in which the pipe joint of the present invention can be applied to connection of a faucet or the like in the form of an elbow.
  • FIG. 10A is a longitudinal side view
  • FIG. 10B is a side view.
  • the other end of the joint body 8 is a bent elbow pipe 10
  • the inner core 9, the joint body 8, and the cap 3 are arranged only on one end side of the joint body 8.
  • the socket type pipe joint 1 shown in FIG. 1 is configured to correspond to one end side
  • the connecting thread surface 10S is arranged on the inner periphery of the tip of the elbow pipe 10 at the other end according to the fitting to be screwed.
  • the pipe joint 2 is fixed at a predetermined position at the time of piping construction, the plastic resin pipe 12 is connected to the joint body 8 at one end by a one-touch operation, and a water tap or a water supply side socket not shown is connected to the other end.
  • Metal fittings can be screwed and fixed.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints With Sleeves (AREA)
PCT/JP2009/064449 2008-08-21 2009-08-18 プラスチック樹脂パイプ用の管継手 WO2010021323A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020117001684A KR101267647B1 (ko) 2008-08-21 2009-08-18 플라스틱수지 파이프용의 관이음매
CN2009801287561A CN102105731B (zh) 2008-08-21 2009-08-18 塑料树脂管用的管接头

Applications Claiming Priority (2)

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JP2008-212848 2008-08-21
JP2008212848A JP4766707B2 (ja) 2008-08-21 2008-08-21 プラスチック樹脂パイプ用の管継手

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KR (1) KR101267647B1 (zh)
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Cited By (2)

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CN108087646A (zh) * 2017-12-21 2018-05-29 海南联塑科技实业有限公司 一种克拉管的螺旋筋内衬过渡件
DE202018104428U1 (de) 2017-11-30 2018-09-24 GEBO Armaturen GmbH Verbindungsystem zur Reparatur von Kunststoffverbundrohrsystemen

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US11280434B2 (en) * 2016-10-03 2022-03-22 Nippon Pillar Packing Co., Ltd. Resin tube fitting
CN107044569A (zh) * 2017-06-10 2017-08-15 赖连容 一种高压玻璃钢管道及其安装方法
CN112590976B (zh) * 2020-12-07 2022-05-17 上海凤凰自行车江苏有限公司 一种智能自行车用照明装置
CN116350875B (zh) * 2023-02-01 2023-11-14 南京竹海生物科技有限公司 一种软管快速衔接环接助推式预充式导管冲洗器

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JP2008025615A (ja) * 2006-07-18 2008-02-07 Sekisui Chem Co Ltd 管継手

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JP3564389B2 (ja) 2000-12-27 2004-09-08 株式会社オンダ製作所 継手
CN200943785Y (zh) * 2006-09-08 2007-09-05 广东强人管业有限公司 一种管道与接头的连接结构

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JPH031395U (zh) * 1989-05-30 1991-01-09
JP2003194273A (ja) * 2001-12-27 2003-07-09 Fuji Koatsu Flexible Hose Co Ltd 接続管継手を備えたフレキシブルホース連結管
JP2008025615A (ja) * 2006-07-18 2008-02-07 Sekisui Chem Co Ltd 管継手

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202018104428U1 (de) 2017-11-30 2018-09-24 GEBO Armaturen GmbH Verbindungsystem zur Reparatur von Kunststoffverbundrohrsystemen
EP3492796A1 (de) 2017-11-30 2019-06-05 GEBO-ARMATUREN GmbH Verbindungssystem zur reparatur von kunststoffverbundrohrsystemen
DE102017128470A1 (de) 2017-11-30 2019-06-06 GEBO Armaturen GmbH Verbindungssystem zur Reparatur von Kunststoffverbundrohrsystemen
CN108087646A (zh) * 2017-12-21 2018-05-29 海南联塑科技实业有限公司 一种克拉管的螺旋筋内衬过渡件
CN108087646B (zh) * 2017-12-21 2023-12-22 海南联塑科技实业有限公司 一种克拉管的螺旋筋内衬过渡件

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JP2010048330A (ja) 2010-03-04
CN102105731B (zh) 2013-02-13
CN102105731A (zh) 2011-06-22
JP4766707B2 (ja) 2011-09-07
KR101267647B1 (ko) 2013-05-24
KR20110031352A (ko) 2011-03-25

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