WO2010001719A1 - 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 PDFInfo
- Publication number
- WO2010001719A1 WO2010001719A1 PCT/JP2009/060947 JP2009060947W WO2010001719A1 WO 2010001719 A1 WO2010001719 A1 WO 2010001719A1 JP 2009060947 W JP2009060947 W JP 2009060947W WO 2010001719 A1 WO2010001719 A1 WO 2010001719A1
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- WIPO (PCT)
- Prior art keywords
- pipe
- ring
- cap
- peripheral surface
- plastic resin
- Prior art date
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Classifications
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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
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/06—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends
- F16L19/061—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends a pressure ring being arranged between the clamping ring and the threaded member or the connecting member
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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
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe
- F16L19/083—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the longitudinal cross-section of the ring not being modified during clamping
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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
- 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
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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
- 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
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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
- F16L47/04—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
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. 10A and 10B are pipe joints of Conventional Example 1 cited as Patent Document 1.
- FIG. 10A is a side sectional view of a state before connection
- FIG. 10B is a side sectional view of a connection state.
- the pipe joint of Conventional Example 1 includes a joint body 110, a split ring 120, and a cap nut 130.
- 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 slit 121 for reducing the diameter, a protruding portion 122 protruding from the inner peripheral surface, and a tapered surface portion t120 at the outer end.
- a fluororesin coating layer is formed on the outer peripheral surface 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 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 inner core portion 112 of the joint body 110, the plastic pipe tip is brought into contact with the proximal end of the inner core portion 112, and then the cap nut 130 is attached to the joint.
- the cap nut 130 pushes the split ring 120 to the proximal end of the inner core portion 112, and the tapered surface t130 of the cap nut 130 presses the split ring 120 to compress and compress the plastic.
- the pipe P includes a notch portion 113 of the inner core portion 112 located on the inner peripheral surface and a protrusion 122 of the split ring 120 located on the outer peripheral surface. It is to hold clamping by.
- FIG. 11A and 11B are explanatory diagrams of Conventional Example 2 cited as Patent Document 2, wherein FIG. 11A is a sectional view of a plastic pipe P in a tightened state, and FIG. 11B is an enlarged view of a main part of FIG. is there. That is, in the conventional example 2, as shown in FIG. 11, the inner peripheral surface recess of the joint body 210 includes the O-ring 220, the auxiliary ring 230, and the locking ring 240 inside the front end, and the outer peripheral surface is rearward.
- a pressure ring 250 having a taper portion t250 having a reduced diameter is sequentially arranged, and a cap 260 having a taper portion t260 aligned with the taper portion t250 of the press ring 250 on the inner periphery of the front end is attached to the joint body 210. Temporary screwing is performed via the surface S260.
- the connecting end of the plastic pipe When connecting the pipe, the connecting end of the plastic pipe is fitted along the cap inner diameter portion C260 and the inner peripheral surface of the joint main body 210, and the cap 260 is screwed into the joint main body 210 to be fastened.
- the pressure ring 250 advances and contracts in diameter by the cooperative action of the taper surface t260 and the taper surface t250 of the press ring 250, and the press ring 250 and the locking ring 240 press and fix the outer peripheral surface of the plastic tube.
- the O-ring 220 is pressed by the advancement of the auxiliary ring 230 by the forward movement, the outer peripheral surface of the plastic pipe is sealed by the radial displacement of the O-ring 220, and the outer periphery of the plastic pipe P is formed by the locking ring 240 and the pressing ring 250.
- the plastic pipe P is inserted into the pipe joint and the cap is rotated. Only that, a pipe fitting plastic tube can be connected with one touch.
- the protrusion 122 on the inner peripheral surface of the split ring 120 bites into the outer peripheral surface of the plastic pipe P due to the reduced diameter of the split ring 120, and bites the outer periphery of the inner core portion 112.
- the plastic pipe P is prevented from being pulled out by a cooperative action with the notch 113, and the plastic pipe P is rotated around the pipe joint by the fastening action of the pipe joint.
- the cap nut 130 and the split ring 120 are individually attached when the plastic pipe P is inserted and joined. There is a problem with sex.
- the split ring 120 is housed in the cap nut 130, and the cap nut 130 is temporarily screwed into the joint main body 110 and is carried to the site.
- the joint body 110, the split ring 120, and the cap nut 130 are disassembled.
- B As shown in FIG. 10A, 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 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 plastic pipe P has a plurality of notches 113 whose inner peripheral surface is an inner core part. Over-compressed due to over-compression due to over-compression by split ring ridge 122, creep deformation (deformation that increases with time without applying stress) occurs over a long period of time, and the water stoppage decreases There is a fear to do.
- the connecting portion at the tip of the plastic pipe is deformed by the biting of the plurality of notches 113 of the inner core portion 112 with respect to the inner peripheral surface and the biting portion 122 of the split ring 120 with respect to the outer peripheral surface, thereby preventing water leakage. Since the state is maintained, the plastically deformed connecting portion of the plastic pipe cannot be used for the pipe connection again.
- an O-ring 220, an auxiliary ring 230, a locking ring 240 and a pressing ring 250 are provided on the inner peripheral surface of the joint body 210.
- It is a one-touch type pipe joint in which a plastic pipe P is inserted into a pipe joint in which the cap inner diameter portion C260 is inserted and temporarily screwed into the joint body, and the cap 260 is screwed and fastened. Since the pipe P is carried into the field as a scroll, it has a winding rod, and the pipe cross section of the connecting portion for insertion into the pipe joint is deformed into an elliptical shape.
- the tip of the pipe collides with the O-ring 220 exposed in the inner diameter direction, and is fitted into the inner peripheral groove of the joint body.
- the O-ring 220 is provided with an action of drawing out in the inner circumferential direction, and the O-ring 220 is removed from the insertion groove, cut or deformed, and the pipe joint to which the plastic pipe is connected is provided with the O-ring 220.
- the sealing performance of the season cannot be demonstrated and there is a fear of leaking water.
- the cap 260 is removed, the plastic pipe P is removed, the pressing ring 250, the locking ring 240, the auxiliary ring 230, and the O-ring 220 are once removed, and then the pipe joint is attached again. Set and insert a plastic tube. Therefore, the connection work of the plastic pipe P with the curl is a difficult work requiring attention, and the workability is poor. Moreover, even if the plastic pipe P can be inserted into the pipe joint without damaging the O-ring 220, the cap fastening operation is performed only when the cap inner diameter portion C260 is in contact with the outer peripheral surface of the plastic pipe P.
- 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.
- the pipe joint for plastic resin pipe has a joint body 8 mounted on the outer periphery of a tubular inner core 9, a cap 3 is attached to the end of the joint body 8, and a pipe 12 Is a pipe joint in which the plastic resin pipe 12 is connected to the inner core 9 through the cap 3 by one-touch operation by turning the cap 3, and the inner core 9 is a pipe having a water passage hole H9.
- the outer peripheral surface 9c includes a threaded surface 9S for screwing the joint body 8 and an O-ring 4 fitted in the locking groove 9G.
- the joint body 8 is in the form of a pipe and has an inner periphery.
- the surface 8d is provided with a screw surface 8S 'for screwing the inner core 9 and the outer peripheral surface 8c is provided with a screw surface 8S for screwing the cap 3, and an end portion of the inner peripheral surface has a tapered surface t8 that expands outward.
- the cap 3 has a rear surface 3B.
- the insertion hole H3 is provided, the front surface of the inner peripheral surface is provided with a screw surface 3S that is screwed with the screw surface 8S of the joint body, and the rear surface of the inner peripheral surface is provided with a tapered surface t3 that is reduced in diameter outwardly.
- the fixing ring 5 having the tapered surface t5 that matches the tapered surface t8 on the outer periphery and the slit 5G for reducing the diameter, the auxiliary ring 6, and the tapered surface t7 that matches the tapered surface t3 of the cap are provided on the outer periphery. Then, the engagement ring 7 provided with the slit 7G for diameter reduction is fitted and contained, and the plastic resin pipe 12 is inserted into the gap dg between the inner core 9 and the joint body 8 from the insertion hole H3 of the cap 3. When the cap 3 is screwed and fastened, the fixing ring 5 and the locking ring 7 are reduced in diameter, and the plastic resin pipe 12 is pressed against the outer peripheral surface 9c of the inner core 9 in a watertight manner.
- 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, the auxiliary ring 6 and the locking ring 7 are molded of polyphenylene oxide resin (trade name: Noryl resin). It is a product.
- 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 dg of the inner core outer peripheral surface 9c.
- the inner core outer peripheral surface 9c may be formed as a smooth surface, or although not shown, a step protrusion for forming the gap dg may be disposed from the joint main 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 plastic resin pipe 12 that employs a pipe joint is preferably a flexible plastic pipe, and is typically made of 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 inner diameters R5 ′ and R7 ′ in the free state of the fixing ring 5 and the locking ring 7 acting to reduce the diameter are the inner diameters in which the outer diameter R12 (standard: 17 mm) of the plastic resin pipe 12 can be loosely fitted together with the auxiliary ring 6. (Standard: 17.6 mm)
- the width of the taper surface t5 and the slit 5G of the fixing ring 5 and the width of the taper surface t7 and the slit 7G of the locking ring 7 are reduced by the diameter of the fixing ring 5 and the locking ring 7.
- the plastic resin pipe 12 may be set to a relational dimension capable of being watertightly pressed against the outer peripheral surface 9c of the inner core 9.
- the relational structure between the taper surface t5 of the fixing ring 5 and the taper surface t8 of the joint body 8 is such that no excessive pressure is applied to the outer peripheral surface 12c of the plastic resin pipe 12 of the fixing ring 5, that is, the joint body inner periphery. It is preferable that the stopper surface st of the surface 8d has a structure that defines the forward movement 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. Passes through the holes H7, H6, H5 for insertion with the retaining ring 7, the auxiliary ring 6 and the fixed ring 5 that are held, and passes through the clearance between the outer peripheral surface 9c of the inner core 9 and the joint with the outer peripheral surface 9c of the inner core 9
- the cap 3 is screwed forward on the joint body 8 just by manually inserting the cap 3 and inserting the cap 3 into the innermost surface 8d of the inner peripheral surface 8d.
- the diameter of the pipe 12 is reduced by the cooperative action of the tapered surface t5 of itself and the tapered surface t8 of the joint body 8, the inner peripheral surface 12d of the pipe 12 is pressed against the O-ring 4 on the outer periphery of the inner core, and is watertight pressed.
- Stop ring 7 also has its own taper
- the diameter of the pipe 12 is reduced by the cooperative action of the surface t7 and the taper surface t3 of the cap 3, the inner peripheral surface 12d of the pipe 12 is pressed against the outer peripheral surface 9c of the distal end portion of the inner core 9, and the tube of the plastic resin pipe 12 is formed by a one-touch method. Connection fastening to the joint can be performed.
- the fixing ring 5 increases the pressing friction force between its own tapered surface t 5 and the tapered surface t 8 of the joint body, and the pipe of the fixing ring 5.
- the fixing ring 5 does not rotate around the pipe 12 due to an increase in frictional force due to the reduced diameter contact with the inner peripheral surface 12d.
- the slit 7G of the locking ring bites into the outer peripheral surface 12c of the pipe 12 and the fixed ring 5 that presses the pipe 12 without rotation.
- the rotation is suppressed by the frictional force via the auxiliary ring 6, and when the cap 3 is finally screwed, the fixing ring 5 and the locking ring 7 do not rotate and only press the pipe 12 against the inner core 9.
- the plastic resin pipe 12 can be tightened and connected by a pipe joint without causing buckling or twisting due to co-rotation at the connection portion.
- the diameters of the fixing ring 5 and the locking ring 7 are reduced by the biting of the diameter-reducing slits 5G and 7G into the outer peripheral surface 12c of the plastic resin pipe.
- the pipe 12 is prevented from being pulled out and the water-tight press against the inner core 9 of the pipe 12 is ensured.
- 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.
- the inner core 9 includes a plurality of O-rings 4, and when the cap 3 is screwed and fastened, the taper surface t5 of the fixing ring 5 and the joint body taper. It is preferable that the fixing ring 5 presses the plastic resin pipe 12 against the O-ring 4 by the cooperative action with the 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 suppressed.
- 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 only needs to have a dimension in which the front-rear direction width (axial width) W5 of the inner peripheral surface 5d covers the site where each O-ring 4 is present.
- the width W5 of the fixing ring 5 is 8 mm.
- the fixing ring 5 and the locking ring 7 are required to have a function of preventing the plastic resin pipe 12 from being pulled out (disengaged), so the inner peripheral surface 5d of the fixing ring 5 and the locking ring 7
- the inner circumferential surface 7d is preferably provided with a frictional force increasing means such as an uneven surface or a threaded surface.
- the O-ring 4 is arranged so that the O-ring 4 is inserted and fitted when the plastic resin pipe 12 is covered and fitted to the inner core 9. Even if the projection is small (standard: 0.5 mm) so as not to become an obstacle, it is possible to obtain a complete watertight pressing action against the plastic resin pipe 12 by the fixing ring 5, and it is easy to insert the plastic resin pipe 12 into the pipe joint. Thus, it is a one-touch type pipe joint that can be connected and fastened only by manually rotating the cap 3, and there is no fear of water leakage or fear of pulling out.
- all members constituting the pipe joint are made of a plastic resin, and at least the inner core 9, the joint body 8, and the cap 3 are 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 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.
- Etc. can be visually observed by an operator, and fastening work is facilitated.
- the conventional water supply pipe and hot water supply pipe are the same color, the cross-linked polyethylene pipe is translucent, and the polybutene pipe is cream-colored, but manufactured and sold by the applicant, can be recycled. High flexibility, 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 a plurality of O-ring 4 regions, and the inner peripheral surface 5d has It is preferable to provide a plurality of circumferential grooves 5G ′. Since the O-ring 4 is typically arranged with two intervals of 5 mm, the axial dimension W5 of the fixing ring 5 may be 8 mm. Further, 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.
- two inner circumferential grooves having a depth of 0.3 mm and a width of 0.3 mm are provided in the front and rear, 5 mm. Arrange at intervals.
- the fixing ring 5 is reduced in diameter with respect to the outer peripheral surface 12c of the plastic resin pipe 12 to generate a pressing action, 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 is pressed by the fixing ring 5 so that the inner peripheral surface 12d is pressed by the plurality of protruding O-rings 4 and the outer peripheral surface 12c bites into the plurality of grooves 5G ′.
- the auxiliary ring 6 includes an outer peripheral surface 6c of the front cylindrical portion and a tapered surface t6 whose diameter is reduced rearward from the outer peripheral surface 6c of the cylindrical portion. It is preferable that the front surface 6F having a large area is in contact with the fixing ring 5 and the rear surface 6B having a small area is in contact with the locking ring 7.
- the auxiliary ring 6 typically has a thickness (axial width) W6 of 2 mm, an outer diameter R6 of a fixed ring outer diameter R5 (standard: 27.6 mm), and a locking ring outer diameter R7.
- the diameter of the insertion hole H6 is slightly smaller than (standard: 27.6 mm).
- the diameter of the insertion hole H6 is the same as the diameter of the insertion hole H5 of the fixing ring 5 (standard: 17.6 mm) and the locking ring. 7 is slightly larger (standard: 18 mm) than the diameter of the insertion hole H7 (standard: 17.6 mm).
- the auxiliary ring 6 is loosely fitted to the plastic resin pipe 12 together with the fixing ring 5 and the locking ring 7 in the initial stage of fastening and advancing the cap 3 of the pipe joint, so that the tapered surface t7 of the locking ring 7 is obtained.
- the auxiliary ring 6 and the fixing ring 5 Is subjected to frictional rotation of the cap taper surface t3, and under the rotation of the locking ring 7, the auxiliary ring 6 and the fixing ring 5 in contact with the front and rear surfaces, and for the diameter reduction of the fixing ring 5 and the locking ring 7.
- the fixing ring 5 After sliding on the plastic resin pipe outer peripheral surface 12c while preventing the slits 5G and 7G from being caught, the fixing ring 5 is not present after the taper surface t5 of the fixing ring 5 contacts the taper surface t8 of the joint body 8. It rotates and contracts to enter the pressing action on the pipe 12.
- the auxiliary ring 6 is subjected to the forward action of the cap 3 in a pressure-contact state between the fixing ring 5 and the locking ring 7, but the auxiliary ring 6 has a large area fixed ring contact with the front surface 6F. Due to the difference in frictional force transmission caused by the difference in area between the contact surface and the small-area locking ring contact surface of the rear surface 6B, the locking ring 7 also becomes free from frictional force from the auxiliary ring 6 and the pipe 12.
- the plastic resin pipe 12 is pressed together with the fixing ring 5 without rotating together with the cap 3, that is, without imparting a twisting action to the plastic resin pipe 12 due to the frictional force generated by the reduced diameter pressing. For this reason, the interposition of the auxiliary ring 6 allows the front fixing ring 5 and the rear locking ring 7 to have a predetermined pressing locking action without causing the plastic resin pipe 12 to twist or buckle together. Play.
- the plastic resin pipe 12 has the fixing ring 5 to press and seal the O-ring 4 and prevent the pull-out, and the locking ring 7 to seal by pressing the inner core outer peripheral surface 9c. As a result, the locking action for preventing pull-out is received. Therefore, the pipe joint of the present invention can be engaged with the front and rear fixing rings 5 without inserting a predetermined plastic resin pipe 12 and manually rotating the cap 3 without giving a joint action to the connection pipe 12. At two sites with the stop ring 7, the pipe 12 has a sealing action and a pull-out prevention action, and can reliably achieve a leak-proof seal and a pull-out prevention connection without damaging the plastic resin pipe 12 for connection. .
- 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 including the fixing ring 5, the auxiliary ring 6, and the locking ring 7 is fitted into the joint 3.
- 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 the faucet 13 as a terminal device or a socket (not shown) can be connected to the other end. It is effective for the pipe construction which adopted No.12.
- 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 can be secured to the outer peripheral surface 9c of the inner core 9 by the fixing ring 5 and the locking ring 7 whose diameter of the plastic resin pipe 12 is reduced by simply screwing the joint 3 to the joint body 8 manually. It can be connected to the inner core 9 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 a perfect circle shape, and smoothly passes 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. Therefore, the pressing of the plastic resin pipe 12 to the outer peripheral surface 9c of the plastic resin pipe 12 by the fixing ring 5 achieves a predetermined watertight pressing.
- the rotational screwing forward action of the cap 3 to the joint body 8 is caused by the auxiliary ring 6 being interposed in the front fixing ring 5 and the rear locking ring 7 which are reduced in diameter by the screwing advancement of the cap 3.
- the plastic resin pipe 12 can be firmly and watertightly attached to the outer peripheral surface 9c of the inner core 9 without giving twist to the plastic resin pipe 12, and the plastic resin pipe 12 is Since it is subjected to pressure contact and locking action at the front and rear two parts of the fixing ring 5 part of the part and the locking ring part 7 of the rear part, it is highly reliable by a one-touch operation by simply tightening the cap 3 by manual rotation. Complete, watertight fastening is possible.
- FIG. 1 (A) is a longitudinal sectional view of the socket-type pipe joint 1.
- the right pipe joint is in a state where the pipe 12 is connected, and the left pipe joint is just before the pipe insertion.
- FIG. 1B is a side view of FIG. 1A.
- the socket-type pipe joint 1 has a joint body 8 screwed onto the outer periphery of an inner core 9 having a water passage hole H9, and a fixing ring 5, an auxiliary ring 6 and a locking ring 7 are attached.
- the cap 3 included in the fitting is screwed onto the outer periphery 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, and 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 peripheral surface of the bulging thick portion has a length of 18 mm.
- a step d9 having a height of 3.65 mm from the inner core outer peripheral surface 9c to the bulging screw surface 9S.
- 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 1.9 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 transparent polyphenylene oxide resin (trade name: Noryl resin) molded product, and has a pipe shape as shown in FIG. 3A.
- the outer peripheral surface 3c has an anti-slip for manual rotation.
- the longitudinal projections 3P are arranged in a hexagonal shape, and the rear surface 3B is provided with a circular insertion hole H3 having a diameter R3 ′′ of 28 mm for inserting the plastic resin pipe 12, slightly more than the front surface 3F (standard) 1 mm)
- a metric fine screw 3S (JISB0207) for screwing the joint body 8 is provided on the inner peripheral surface 3d from the inner side over 12 mm in the front and rear, and the tapered surface t7 of the locking ring 7 is in contact with the inner side of the rear surface 3B. This is provided with a tapered surface t3.
- the pipe-shaped cap 3 has a general thickness of 3.5 mm, a length L3 of 38 mm, and a cylindrical outer peripheral surface 3c having a diameter R3 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 ′ at the center of the rear surface 3B of the insertion hole H3 is 17.6 mm
- the thread surface 3S in front of the inner peripheral surface 3d has a width of 12 mm. It has a metric fine thread surface with a pitch interval of 1.5 mm and a height of 0.8 mm.
- the taper 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 decreases 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 sealing member that is fitted in and attached to the locking groove 9G having a width of 1.9 mm and a depth of 1.4 mm of the inner core 9, and is a thick nitrile rubber (JISB2401) that has excellent wear resistance and heat resistance.
- This is a circular ring with a cross-section having a width W4 of 1.9 mm and an inner diameter R4 of 9.8 mm, and is colored black (colored with a stock solution).
- FIG. 6A and 6B are explanatory views of the fixing ring 5, wherein FIG. 6A is a side view, FIG. 6B is a longitudinal side view, and FIG. 6C is a front view.
- the fixing ring 5 is a molded product made of polyphenylene oxide resin (trade name: Noryl resin), and the overall shape is a diameter for inserting the plastic resin pipe 12 at the center as shown in FIG.
- R5 ′ is provided with an insertion hole H5 of 17.6 mm, a front-rear width W5 is 8 mm, a rear end is provided with a flange 5E having a diameter R5 of 27.6 mm and a thickness of 1 mm, and an outer peripheral surface 5c is provided with a rear
- a tapered surface t5 whose diameter is reduced from the flange 5E at the end to the front end is provided so as to be aligned with the tapered surface t8 at the inner periphery of the distal end of the joint body 8.
- a slit 5G having a small width (standard: 2 mm) is provided to reduce the diameter when external pressure is applied to the fixing ring 5, and the inner peripheral surface 5d is reduced in diameter to the plastic resin pipe 12.
- a circular groove (standard: depth 0.3 mm, width 0.3 mm) for the plastic resin pipe outer peripheral surface 12c to bite in by elastic deformation is formed on the front of the inner peripheral surface 5d. It is arranged at the rear.
- FIG. 7A and 7B are explanatory views of the auxiliary ring 6, in which FIG. 7A is a side view, FIG. 7B is a rear view, and FIG. 7C is a longitudinal side view.
- the auxiliary ring 6 is a non-reducing thin flat plate ring interposed between the reducing ring 5 and the locking ring 7, and is a molded product made of polyphenylene oxide resin (trade name: Noryl resin). It is. As shown in FIG.
- the overall shape is provided with an insertion hole H6 having a thickness (width in the front-rear direction) W6 of 2 mm, an outer diameter R6 of 26.5 mm, and a diameter R6 ′ of 18 mm at the center.
- the outer peripheral surface 6c is provided with a tapered surface t6 that is reduced in diameter toward the rear surface 6B, and contacts the front surface of the locking ring 7 with respect to the area of the front surface 6F that contacts the flange 5E of the fixing ring 5. The area is small.
- FIG. 8A and 8B are explanatory views of the locking ring 7, wherein FIG. 8A is a side view, FIG. 8B is a rear view, and FIG. 8C is a longitudinal side view.
- the locking ring 7 is a molded product made of polyphenylene oxide resin (trade name: Noryl resin). As shown in FIG. 8 (C), the locking ring 7 has an axial (front-rear) width W7 of 9 mm and a front diameter R7.
- the outer peripheral surface 7c is aligned with the tapered surface t3 of the inner periphery of the rear portion of the cap 3 with the tapered surface t7 having a diameter reduced to the rear surface through a horizontal portion 7W having a small width (standard: 1.7 mm) on the front surface. Arranged.
- an insertion hole H7 having a diameter R7 ′ of 17.6 mm is arranged for insertion of the plastic resin pipe 12, and the locking ring 7 is provided on the inner peripheral surface 7d in the same manner as the inner peripheral surface of the fixing ring 5.
- a small groove standard: depth 0.3 mm, width 0.3 mm
- the pipe joint has a locking groove 9G (width: 1.G) arranged in a cylindrical portion of the inner core 9 whose outer diameter R9 ′ of the cylindrical outer peripheral surface 9c is 12.6 mm.
- the tapered surface t7 of the locking ring 7 is the tapered surface of the cap 3 in the order of the locking ring 7, the auxiliary ring 6, and the fixing ring 5.
- the auxiliary ring 6 is fitted and contained with the rear surface 6B on the tapered surface t6 side as the locking ring 7 side, and the fixing ring 5 with the tapered surface t5 on the front surface, and the cap 3 is attached to the end of the joint body 8.
- it is temporarily screwed and carried into the construction site.
- the insertion holes of the locking ring 7, the auxiliary ring 6, and the fixing ring 5 are aligned with the cap insertion hole.
- 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) at the rear end of the cap 3, the copolymer (PE-RT) resin pipe 12 is connected to each locking ring 7 (hole diameter: 17.6 mm) and auxiliary ring 6 (hole diameter: 18 mm) and the fixing ring 5 (hole diameter: 17.6 mm) are inserted into the outer periphery of the inner core 9 in a covering form, and the gap dg is inserted to the step portion d9. In this case, since the cap 3, the joint body 8, and the inner core 9 are transparent, the plastic resin pipe 12 does not cause any displacement in the O-ring 4 and is visually confirmed to be inserted into the step portion d9. I can do it.
- PE-RT copolymer
- the cap 3 is rotated by hand, and the joint body 8 is screwed forward until it feels hard. Then, as the cap 3 rotates forward with respect to the joint body 8, the locking ring 7, auxiliary ring 6, and fixing ring 5 included in the cap 3 also move forward and loosely fit on the outer periphery of the plastic resin pipe 12.
- the fixing ring 5 and the locking ring 7 have a taper surface t5 that is pressed by the taper surface t8 of the joint body, and the locking ring 7 has a taper surface t7 that is a taper surface at the rear end of the cap 3, respectively. Due to the pressing action at t3, both diameters are reduced and the outer peripheral surface 12c of the plastic resin pipe 12 is pressed.
- the fixing ring 5 presses the outer peripheral surface of the arrangement area of the O-ring 4 and the inner peripheral surface of the plastic resin pipe 12. 12d and the inner peripheral surface 9d of the inner core 9 are completely watertight pressed, and the locking ring 7 also achieves watertight pressing of the inner peripheral surface 12d of the plastic resin pipe to the inner peripheral surface 9d of the inner core 9, and at the same time
- the groove 5G 'and slit 5G on the inner peripheral surface 5d of the fixing ring 5 and the groove 7G' and slit 7G on the inner peripheral surface 7d of the locking ring 7 are formed on the outer peripheral surface 12c of the flexible plastic resin pipe 12.
- the pipe 12 can be connected with one touch by inserting the pipe 12 from both sides and rotating and tightening the cap 3, and the watertight press and pull-out prevention holding are achieved.
- FIG. 9 is an explanatory view in which the pipe joint of the present invention is applied to a faucet connection in the form of an elbow, wherein FIG. 9 (A) is a longitudinal side view and FIG. 9 (B) 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, and the plastic resin pipe 12 is connected to the joint body 8 at one end by a one-touch operation, and the faucet 13 or the other end is shown. It is possible to screw and fix the socket fitting on the water supply side.
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Abstract
Description
そのため、プラスチック樹脂パイプの接続に有効な管継手として、従来例1及び2の継手が提案されている。
即ち、従来例1(図10)の管継手は、継手本体110と、割りリング120と、袋ナット130とから成り、図10(A)に示す如く、継手本体110は、外周面にねじ面を備えた雄ねじ管部111からインナーコア部112を突設し、インナーコア部112の外周面には、プラスチック管の内周面を保持するための係止用刻み部113を、全長に亘って配置している。
また、袋ナット130には、前部内周面に、雄ねじ管部111の外周に螺合するための雌ねじ部131を配置し、後部内周面には、割りリング120を縮径するためのテーパー面部t130を配置し、該テーパー面部t130にはフッ素樹脂の被覆層133を形成している。
即ち、従来例2は、図11に示す如く、継手本体210の内周面凹部には、Oリング220と、補助リング230と、係止リング240を前端内側に内包し、外周面が後方へ縮径するテーパー部t250を備えた縮径可能な押圧リング250を順次配置し、押圧リング250のテーパー部t250と整合するテーパー部t260を前端内周に備えたキャップ260を継手本体210に、ネジ面S260を介して仮螺合しておくものである。
(a).継手本体110、割りリング120、袋ナット130に分解する。
(b).図10(A)の如く、プラスチック管Pに袋ナット130と割りリング120とを間隔を保って嵌合する。
(c).プラスチック管Pをインナーコア部112の基端まで被着する。
(d).割りリング120をインナーコア部112に移動する。
(e).袋ナット130を割りリング120上に被着して継手本体110に螺着する。
以上、(a)~(e)の作業工程での接続作業となり、管の接続は煩雑で、時間を要する。
また、プラスチック管の先端の接続部は、内周面に対するインナーコア部112の複数の刻み部113の食い込みと、外周面に対する割りリング120の突条部122の食い込みとによって変形して、漏水防止状態が維持されるため、プラスチック管の塑性変形した接続部は、再度の管接続には利用出来ない。
従って、巻癖の付いたプラスチック管Pの接続作業は、注意力を要する困難な作業となり、作業性が悪い。
また、例え、プラスチック管PがOリング220を損傷せずに管継手内に挿入出来ても、キャップ締着作業は、キャップ内径部C260がプラスチック管P外周面に接触していること、及び最終締付けが押圧リング250に回動押圧力を付与することにより、プラスチック管Pは共廻りして部分捩れを発生し、プラスチック管Pに座屈、又は応力歪を生じ、プラスチック管自体の耐久性を損なう問題がある。
本発明は、これら従来例1,2の問題を解決又は改善した画期的な、ワンタッチ接続タイプのプラスチック管継手を提供するものである。
また、Oリング4は、典型的には、耐磨耗性、耐熱性に優れた、JISB2401のニトリルゴムの太さ1.9mmの断面円形リングであり、採用するプラスチック樹脂パイプ12の許容誤差に対応出来る形態に配置すれば良く、JIS規格の呼び径13mmの外径R12が17mm、内径R12´が13mmのプラスチック樹脂パイプ12では、許容誤差が±0.15mmであるため、太さ1.9mmのOリング4は、外径R9´が12.6mmのインナーコア9の外周面9cから0.5mm突出形態とすれば良い。
そして、Oリング4は、プラスチック樹脂パイプ12の径の許容誤差にも十分なシール性で対応するため、典型的には、2本配置とし、各Oリング4は固定リング5の押圧域内での配置とすれば良い。
そして、固定リング5のテーパー面t5と継手本体8のテーパー面t8との関係構造は、固定リング5のプラスチック樹脂パイプ12の外周面12cへの過押圧を生じない形態、即ち、継手本体内周面8dのストッパー面stが固定リング5の前進を規定する構造とするのが好ましい。
また、キャップ3の締着初期段階で、固定リング5と係止リング7が、キャップ3の回動によるパイプ12外周面12cに対する摺動回動での前進は、補助リング6の介在により、固定リング5のスリット5Gと係止リング7のスリット7Gとの接触協仂が断たれ、パイプ12に捩れを生ずること無く進む。
そして、係止リング7も縮径してパイプ12を押圧する段階では、係止リングのスリット7Gがパイプ12の外周面12cに食い込む作用と、無回動でパイプ12を押圧する固定リング5から補助リング6を介した摩擦力とによって、回動が抑制され、キャップ3の最終螺着時には、固定リング5及び係止リング7は無回動でパイプ12をインナーコア9に押圧するだけであり、プラスチック樹脂パイプ12は、接続部に、共廻りによる座屈、又は捩れを生ずることなく管継手での締着接続が出来る。
そのため、本発明の管継手は、簡単なワンタッチ方式での接続締着作業でありながら、プラスチック樹脂パイプ12の接続部には共廻り現象を生ずることなく、Oリング4に対する変位、損傷も生ずることなく、しかも、接続部の前後2部位での、確実な水密押圧及び確実なパイプ止着保持を可能とする。
この場合、Oリング4は、複数本を間隔を保って配置すれば、プラスチック樹脂パイプ内周面12dとOリング4群とは、面シールを構成し、各Oリング4の突出寸法を抑えても十分なシール作用が得られるが、典型的には、Oリング4は、中心間隔(L9´)を5mmで、各Oリング4をインナーコア外周面9cから0.5mm突出形態で配置する。
この場合、固定リング5は、係止リング7と共に、プラスチック樹脂パイプ12の抜脱(抜け出し)をも阻止する機能が要求されるため、固定リング5の内周面5d、及び係止リング7の内周面7dには、例えば、凹凸面、ねじ面等の摩擦力増加手段を付与するのが好ましい。
この場合、透視可能とは、透明又は着色半透明であって、裏側(内側)の部品(部材)が透過目視出来る意味である。
また、Oリング4は、プラスチック樹脂パイプの内側となる部材であるため、黒色としておけば、着色プラスチック樹脂パイプ12を介しての外部からの目視も可能となる。
尚、慣用の、給水管、給湯管は同色物であって、架橋ポリエチレン管は半透明、ポリブテン管はクリーム色であるが、本出願人が製造、販売している、リサイクルが可能で、可撓性が高い、エチレン.オクテン.コポリマー樹脂製の給水・給湯管を採用すれば、給水管はホワイトでの、給湯管はピンクでの半透明管である。
尚、Oリング4は、典型的には、5mm間隔の2本配置であるため、固定リング5の軸方向寸法W5は8mmとすれば良い。
また、内周面5dの周方向条溝5G´は、プラスチック樹脂パイプ外周面12cに対する係止保持(引き抜け阻止)機能を奏すれば良く、条溝5G´の幅、深さ、間隔は、対象プラスチック樹脂パイプ12に応じて適宜に決定すれば良いが、典型的には、図6(B)の如く、深さ0.3mm、幅0.3mmの内周溝を前後に2本、5mm間隔で配置する。
そして、プラスチック樹脂パイプ12は、固定リング5の押圧作用によって、内周面12dが複数本の突出Oリング4で押圧され、外周面12cが複数の条溝5G´内へ食い込むため、固定リング5は、プラスチック樹脂パイプ12に、水密シール作用、及び引き抜け阻止作用を、面作用で付与することとなり、強固な水密押圧、及び強固な係止保持作用を果たす。
この場合、補助リング6は、典型的には、厚さ(軸方向幅)W6が2mmであり、外径R6が、固定リング外径R5(標準:27.6mm)及び係止リング外径R7(標準:27.6mm)より若干小さい径(標準:26.5mm)であり、挿入用孔H6の径は、固定リング5の挿入用孔H5の径(標準:17.6mm)及び係止リング7の挿入用孔H7の径(標準:17.6mm)より若干大(標準:18mm)である。
そのため、補助リング6の介在によって、前側の固定リング5と後側の係止リング7とは、プラスチック樹脂パイプ12に、共廻り捩れ、又は捩れ座屈を生ずることなく、所定の押圧係止作用を奏する。
そのため、本発明の管継手は、所定のプラスチック樹脂パイプ12を挿入して、キャップ3を手動で回転するだけで、接続パイプ12に共廻り作用を付与することなく、前後の固定リング5と係止リング7との2部位で、パイプ12にシール作用及び引き抜け防止作用を奏するものとなり、接続用のプラスチック樹脂パイプ12を傷めることなく、確実に耐漏水シール及び引き抜け防止の接続が達成出来る。
この場合、継手本体8及びインナーコア9は、図1に示す如く、長手方向に左右対称形態で準備し、固定リング5、補助リング6及び係止リング7を嵌合内包したキャップ3を、継手本体8の両端に嵌合すれば、該管継手は、両側からのプラスチック樹脂パイプ12の挿入接続が可能となる。
従って、該左右対称の両頭形態のソケット型管継手は、プラスチック樹脂パイプ12の長尺化継手として有効である。
この場合、継手本体8は、一半には管継手構造を、他半には屈曲エルボ管10を一体化成形で形成すれば良く、インナーコア9は、図9(A)に示す如く、継手本体の管継手構造に対応する寸法に準備すれば良い。
従って、本発明の管継手を採用すれば、一端にはプラスチック樹脂パイプ12がワンタッチ操作で接続出来、他端には端末機器としての水栓13、又は図示しないソケットが接続出来るため、プラスチック樹脂パイプ12を採用した配管施工に有効である。
図1(A)は、ソケット型管継手1の縦断断面図であって、図(A)に於いて、右側の管継手はパイプ12を接続した状態を、左側の管継手はパイプ挿入寸前の状態を示す図であり、図1(B)は、図1(A)の側面図である。
ソケット型管継手1は、図1(A)に示す如く、通水孔H9を備えたインナーコア9の外周に継手本体8を螺着し、固定リング5、補助リング6及び係止リング7を嵌合内包したキャップ3を継手本体8の外周に螺合するものである。
図4はインナーコア9の説明図であって、(A)は縦断側面図、(B)は側面図である。
インナーコア9は、透明で、ポリエーテルイミド樹脂(商品名:ウルテム樹脂)製の、一般肉厚が3mmのパイプ形状成形品であり、全長L9が98mm、通水孔H9となる内径R9”は6.7mm、外径R9´は12.6mmであって、円筒中央部外周には径R9が20mmの膨出厚肉部を有し、該膨出厚肉部周面には、長さ18mmに亘るねじ面9Sを備え、インナーコア外周面9cから膨出ねじ面9Sに亘って、高さ3.65mmの段差d9を備えている。
また、両端外周には、プラスチック樹脂パイプ12への挿入を円滑にするための1/3勾配のテーパー面t9を付設し、外周面9cの段部d9と先端との中間位置には、Oリング4を嵌入するための、幅1.9mm、深さ1.4mmの係止溝9Gを間隔L9´が5mmで2本配置したものである。
図2は継手本体の説明図であって、(A)は縦断側面図、(B)は端面図、(C)は側面図である。
継手本体8は、インナーコア9同様に、透明で、一般肉厚4mmのポリエーテルイミド樹脂(商品面:ウルテム樹脂)製のパイプ形状成形品であり、外周面8cの両側には、キャップ3を、緩みを生じないように螺合するための、ねじ間隔の短いメートル細目ねじ(JISB0207)を、外周面8cよりねじ山が突出する形態でねじ面8Sを配設し、また外周面8c中央には、インナーコア取付時に、継手本体8の回動を抑止する治具(レンチ等)当接用の平坦面8fを表裏に対称配置し、内周面8dの長さ方向中央部には、インナーコア9螺着用のねじ面8S´を内周面8dから突出形態で配置した。
そして、テーパー面t8は、長さL8´が7mmで、内端径が21.6mm、外端径が22.4mmで形成した。
継手本体8の寸法関係は、外径R8が26.4mm、全長L8が73mmで、中央には径R8´が19.6mmで貫通する挿入用孔H8を備え、内周面8dの長さ方向中央部には、長さ18mmに亘って、インナーコア螺着用のねじ面8S´を内周面8dから突設形態で配置し、外周面両側のねじ面8Sは、先端から長さ(L8´)7mmを置いて、長さ12mmの範囲に配置した。
図3(A)はキャップ3の後面図、図3(B)は縦断側面図である。
キャップ3は、透明なポリフェニレンオキサイド樹脂(商品名:ノリル樹脂)成形品であって、図3(A)に示す如く、パイプ形状であって、外周面3cには手動回転の滑り止め用に、長手方向の突起3Pを六角形状に配置し、後面3Bには、プラスチック樹脂パイプ12を挿入するための、円形状の、径R3”が28mmの挿入用孔H3を備え、前面3Fより若干(標準:1mm)内側から内周面3dには、継手本体8螺合用の、メートル細目ねじ3S(JISB0207)を前後12mmに亘って備え、後面3B内側には、係止リング7のテーパー面t7当接用のテーパー面t3を備えたものである。
図5(A)は、Oリングの正面図であり、図5(B)はOリングの縦断側面図である。
Oリング4は、インナーコア9の、幅1.9mm、深さ1.4mmの係止溝9Gに嵌入装着するシール部材であり、耐摩耗性、耐熱性に優れたニトリルゴム(JISB2401)の太さW4が1.9mm、内径R4が9.8mmの断面円形リングであり、黒色に着色(原液染め着色)したものである。
図6は、固定リング5の説明図であって、(A)は側面図、(B)は縦断側面図、(C)は前面図である。
固定リング5はポリフェニレンオキサイド樹脂(商品名:ノリル樹脂)製の成形品であって、全体形状は、図6(A)に示す如く、中央には、プラスチック樹脂パイプ12を挿入するための、直径R5´が17.6mmの挿入用孔H5を備え、前後方向幅W5が8mmで、後端には、径R5が27.6mm、厚さ1mmのフランジ5Eを備え、外周面5cには、後端のフランジ5Eから前端へと縮径するテーパー面t5を、継手本体8の先端内周のテーパー面t8に整合する形態で備えている。
図7は補助リング6の説明図であって、(A)は側面図、(B)は後面図、(C)は縦断側面図である。
補助リング6は、縮径する固定リング5と縮径する係止リング7との間に介在する非縮径の薄平板リングであって、ポリフェニレンオキサイド樹脂(商品名:ノリル樹脂)製の成形品である。
全体形状は、図6(C)に示す如く、厚さ(前後方向幅)W6が2mm、外径R6が26.5mmで、中央には、径R6´が18mmの挿入用孔H6を備え、外周面6cには、後面6B側に縮径するテーパー面t6を備えて、固定リング5のフランジ5Eと当接する、前面6Fの面積に対し、係止リング7の前面と当接する、後面6Bの面積を小としたものである。
図8は係止リング7の説明図であって、(A)は側面図、(B)は後面図、(C)は縦断側面図である。
係止リング7は、ポリフェニレンオキサイド樹脂(商品名:ノリル樹脂)製の成形品であって、形状は、図8(C)に示す如く、軸方向(前後方向)幅W7が9mm、前面径R7が27.6mmで、外周面7cは、前面の小幅(標準:1.7mm)の水平部7Wを介して後面に縮径するテーパー面t7を、キャップ3後部内周のテーパー面t3と整合形態に配置した。
また、図8(B)に示す如く、係止リング7の周面に圧力が付加されれば、即ち、キャップ3のテーパー面t3がテーパー面t7を押圧すれば、縮径するための小幅(標準:2mm)のスリット7Gを軸線方向の割り溝形態で配置したものである。
管継手は、工場内で、図1(A)に示す如く、インナーコア9の、円筒外周面9cの外径R9´が12.6mmの円筒部に配置した係止溝9G(幅:1.9mm、深さ1.4mm)に、黒色のOリング4(径1.9mm、内径9.8mm)を嵌合し、次いで、ソケット用継手本体8内周面8dの中央部のねじ面8S´に、ソケット用のインナーコア9外周面中央部のねじ面9Sを螺合締着し、継手本体8とインナーコア9とを、両側にパイプ挿入用の隙間dgを備えた形態とする。
この場合、継手本体外周面8cの中央に配置した、両側の平坦面8fを挟み込んでインナーコア9を螺合締着するので作業性が良い。
尚、キャップ3を継手本体8に仮螺合した状態では、係止リング7、補助リング6及び固定リング5の各挿入用孔は、キャップ挿入用孔と整合形態となる。
この場合、キャップ3、継手本体8、インナーコア9は透明であるため、プラスチック樹脂パイプ12が、Oリング4に変位を生ぜず、且つ段部d9まで適正に嵌入した状態を目視確認して実施出来る。
そして、キャップ3の、継手本体8に対する回転前進によって、キャップ3内に内包されている、係止リング7、補助リング6、固定リング5も前進し、プラスチック樹脂パイプ12外周に緩嵌合であった固定リング5及び係止リング7は、それぞれ、固定リング5はテーパー面t5が継手本体のテーパー面t8での押圧作用で、係止リング7はテーパー面t7がキャップ3の後端のテーパー面t3での押圧作用で、共に縮径して、プラスチック樹脂パイプ12の外周面12cを圧接する。
即ち、図1に示すソケット型管継手にあっては、両側からパイプ12を挿入し、キャップ3を回転締付けるだけで、パイプ12の接続がワンタッチで達成出来、しかも、水密押圧と引き抜け防止保持は、前後2部位で実施出来、安全性の保証出来るパイプ接続が達成出来る。
図9は、本発明の管継手をエルボ形態として水栓接続に適用した説明図であって、図9(A)は縦断側面図、図9(B)は側面図である。
この場合、図9(A)に示す如く、継手本体8の他端は屈曲したエルボ管10とし、インナーコア9、継手本体8、キャップ3は、継手本体8の一端側にのみ配置する形態、即ち、図1のソケット型管継手1の一端側対応構成とし、他端のエルボ管10の先端内周には接続用ねじ面10Sを、螺着する金具に応じて配置したものである。
従って、図9(B)に示す如く、所定位置に管継手2を固定して、一端の継手本体8に、プラスチック樹脂パイプ12をワンタッチ操作で接続し、他端には水栓13、或いは図示しない給水側のソケット金具等を螺合固定することが出来る。
2 エルボ型管継手(管継手)
3 キャップ
3B,5B,6B,7B 後面
3c,5c,6c,7c,8c,9c,12c 外周面
3d,5d,7d,8d,9d,12d 内周面
3F,5F,6F,7F 前面
3P 突起
3S,8S,8S´,9S,10S ねじ面
4 Oリング
5 固定リング
5E フランジ
5G,7G スリット
5G´,7G´ 条溝
6 補助リング
7 係止リング
7W 水平部
8 継手本体
8f 平坦面
9 インナーコア
9G 係止溝
10 エルボ管
12 プラスチック樹脂パイプ(パイプ)
13 水栓
dg 隙間
d9 段部
H3,H5,H6,H7,H8 挿入用孔
H8´ 嵌合孔
H9 通水孔
t3,t5,t6,t7,t8,t9 テーパー面
st ストッパー面
Claims (7)
- 管状のインナーコア(9)の外周に継手本体(8)を装着し、継手本体(8)の端部にキャップ(3)を冠着し、プラスチック樹脂パイプ(12)をキャップ(3)を介してインナーコア(9)上に被覆挿入し、キャップ(3)の回動によってワンタッチでプラスチック樹脂パイプ(12)を接続する管継手であって、インナーコア(9)は、通水孔(H9)を備えたパイプ形態であって、外周面(9c)には、継手本体(8)を螺着するねじ面(9S)と、係止溝(9G)に嵌合したOリング(4)とを備え、継手本体(8)は、パイプ形態であって、内周面(8d)には、インナーコア(9)螺着用のねじ面(8S´)を、外周面(8c)にはキャップ(3)螺着用のねじ面(8S)を備えると共に、内周面端部には外方に拡径するテーパー面(t8)を備え、キャップ(3)は、後面(3B)に挿入用孔(H3)を備え、内周面前部には継手本体のねじ面(8S)と螺合するねじ面(3S)を、内周面後部には外方に縮径するテーパー面(t3)を備え、且つ、継手本体のテーパー面(t8)と整合するテーパー面(t5)を外周に有して縮径用のスリット(5G)を備えた固定リング(5)と、補助リング(6)と、キャップのテーパー面(t3)と整合するテーパー面(t7)を外周に有して縮径用のスリット(7G)を備えた係止リング(7)とを嵌合内包し、プラスチック樹脂パイプ(12)を、キャップ(3)の挿入用孔(H3)からインナーコア(9)と継手本体(8)との隙間(dg)に挿入し、キャップ(3)の螺合締着によって、固定リング(5)及び係止リング(7)が縮径して、プラスチック樹脂パイプ(12)をインナーコア(9)外周面(9c)に水密押圧する、プラスチック樹脂パイプ用の管継手。
- インナーコア(9)が複数のOリング(4)を備え、キャップ(3)の螺合締着時に、固定リング(5)のテーパー面(t5)と継手本体テーパー面(t8)との協仂作用によって、固定リング(5)がプラスチック樹脂パイプ(12)をOリング(4)に押圧する、請求項1の管継手。
- 管継手を構成する全部材がプラスチック樹脂製であって、少なくとも、インナーコア(9)、継手本体(8)及びキャップ(3)は透視可能プラスチック樹脂製である、請求項1又は2の管継手。
- 固定リング(5)は、軸方向幅(W5)が、複数のOリング(4)域を覆う寸法を備え、且つ、内周面(5d)には複数本の周方向条溝(5G´)を備えている、請求項1乃至3のいずれか1項の管継手。
- 補助リング(6)は、外周面が、前面の円筒部の外周面(6c)と、円筒外周面(6c)から後方に縮径するテーパー面(t6)とを備えた薄板リングであって、大面積の前面(6F)が固定リング(5)に、小面積の後面(6B)が係止リング(7)に面当接する、請求項1乃至4のいずれか1項の管継手。
- インナーコア(9)及び継手本体(8)が長手方向に左右対称構造のソケット形態であって、両側からキャップ(3)を嵌合して、両側からプラスチック樹脂パイプ(12)を挿入接続する、請求項1乃至5のいずれか1項の管継手。
- 継手本体(8)がエルボ形態であって、一端の管継手に、プラスチック樹脂パイプ(12)を接続締着可能とし、エルボ管(10)の他端内面には接続用ねじ面(10S)を備えた、請求項1乃至5のいずれか1項の管継手。
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JP2012219942A (ja) * | 2011-04-11 | 2012-11-12 | Mitsubishi Plastics Inc | 配管用継手及び継手構造 |
US9464436B2 (en) | 2012-01-23 | 2016-10-11 | Vastint Hospitality B.V. | Prefabricated panel for a building |
US9556632B2 (en) | 2012-01-23 | 2017-01-31 | Vastint Hospitality B.V. | Method and system for construction of a building |
US9631359B2 (en) | 2012-01-23 | 2017-04-25 | Vastint Hospitality B.V. | Prefabricated module for a building |
USD765266S1 (en) | 2013-07-22 | 2016-08-30 | Vastint Hospitablity B.V. | Prefabricated module design |
USD867616S1 (en) | 2013-07-22 | 2019-11-19 | Vastint Hospitality B.V. | Prefabricated module |
US9657874B2 (en) | 2014-04-25 | 2017-05-23 | Kohler Co. | Plumbing fitting adapter |
GB2585667A (en) * | 2019-07-10 | 2021-01-20 | Reliance Worldwide Corporation Uk Ltd | A fibre optic cable connector |
GB2585667B (en) * | 2019-07-10 | 2023-08-02 | Reliance Worldwide Corporation Uk Ltd | A fibre optic cable connector |
US11976759B2 (en) | 2019-07-10 | 2024-05-07 | Reliance Worldwide Corporation (UK) Limited | Tube coupling |
Also Published As
Publication number | Publication date |
---|---|
CN102047023A (zh) | 2011-05-04 |
JP2010007820A (ja) | 2010-01-14 |
JP4730972B2 (ja) | 2011-07-20 |
CN102047023B (zh) | 2014-04-16 |
KR20110018364A (ko) | 2011-02-23 |
KR101254862B1 (ko) | 2013-04-15 |
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