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41. 发明专利

JP2001056079A PIPE JOINT 失效
公开(公告)号：JP2001056079A
公开(公告)日：2001-02-27
申请号：JP23034399
申请日：1999-08-17
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , BAI HIDEKI , SAKAMOTO HIROAKI , YOSHIDA YOICHI
IPC分类号： F16L21/08 , F16L41/02 , F16L41/08
摘要： PROBLEM TO BE SOLVED: To provide a pipe joint easy to manufacture and having high disengagement preventing and rotation preventing properties. SOLUTION: A raised part 28 increases the diameter of the other end part of a resin pipe 20. A slope part 50 is formed on a transition part form a non- expanded diameter part 46 to an expanded diameter part 48. When a ring 22 having an inner diameter smaller than the outer diameter of the expanded diameter part 48 is engaged on the outer peripheral surface of the resin pipe 20 (expanded diameter part 48), the ring 22 can be forced to be inserted toward the expanded diameter part 48 side along the outer surface of the slope part 50. The ring 22 engaged with the resin pipe 20 (expanded diameter part 48) clamps and compresses the expanded diameter part 48 to press-contact an inner peripheral surface of the expanded diameter part 48 against an outer surface of the raised part 28, thereby fixing the resin pipe 20 to the raised part 28 firmly. This provides a high disengagement preventing and rotation preventing properties. This also facilitates the manufacturing, and reduces the cost.

42. 发明专利

JP2000180292A EVALUATING METHOD OF METALLIC JOINT 失效
公开(公告)号：JP2000180292A
公开(公告)日：2000-06-30
申请号：JP36137298
申请日：1998-12-18
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , SAKAMOTO HIROAKI , FUKUI CHIKANORI
IPC分类号： G01M3/26 , F16L21/04 , G01N3/12
摘要： PROBLEM TO BE SOLVED: To accurately evaluate watertight performance for a long time in response to actual working conditions when a metallic ferrule with saddle is mounted on a resin pipe of polyolefin resin. SOLUTION: In this evaluating method, a resin pipe of polyolefin resin is cut off into a predetermined length for a test piece 12a and a metallic ferrule with saddle 10 is mounted on the test piece 12a to be a test object 48. Then under a temperature of 80 deg.C or under, an internal pressure of 1.10 Mpa is applied to the test piece 12a for 165 hours to exemplify a secular deformed state of the test object 48. After this, the test object 48 is cooled to 40 deg.C under no pressure and water-tightness is checked in a internal pressure range from low to high pressure. That is, water-tightness is verified under conditions that the actual working environment is assumed.

43. 发明专利

JP2000161574A SNAP TAP SADDLE 失效
公开(公告)号：JP2000161574A
公开(公告)日：2000-06-16
申请号：JP33220498
申请日：1998-11-24
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , SAKAMOTO HIROAKI , FUKUI CHIKANORI
IPC分类号： F16L41/02 , F16L41/08
摘要： PROBLEM TO BE SOLVED: To effectively prevent leakage in branch part. SOLUTION: A thinned part 34 is formed inside a snap tap saddle 10. Elapsing a long time after letting water to pass through a pipe 12, the pipe 12 is expanded by the hydraulic pressure and the expansion part 46 is entered into the theft part 34. As a result, the pipe 12 and the snap tap saddle 10 are engaged with each other in the thinned 34. In a branch part, the hydraulic pressure applied to the pipe is supported by the snap tap saddle 10 and the gasket 40, however, compared with a case of having no thinned part 34 inside the snap tap saddle 10, the area supporting the hydraulic pressure is narrowed. Compared with the case having no thinned 34, the pressure applying to the connecting face of each of the snap tap saddle 10 and the gasket 40 with the pipe 12 is increased, and a force compressing the gasket 40 is enlarged.

44. 发明专利

JPH11325317A POLYOLEFINIC LINER PIPE, AND EXECUTING METHOD THEREFOR 失效
公开(公告)号：JPH11325317A
公开(公告)日：1999-11-26
申请号：JP13248198
申请日：1998-05-15
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , ENOMOTO HIDEKAZU , HARADA TAKATOMO
IPC分类号： F16L1/00 , B29C63/34 , B29L23/00 , F16L11/04
摘要： PROBLEM TO BE SOLVED: To easily insert with simple constitution a polyolefinic liner pipe into a curved pipe line. SOLUTION: In this executing method for a polyolefinic liner pipe 1, the polyolefinic liner pipe 1 provided by winding a rope body 2 made of a heat- resistant material into a spiral form to be fixed partially in an outer circumference of a polyolefinic resin tube deformed to form a U-shaped cross-section is heated to be inserted into an existing tube, then the partial fixing is released, and fastening force for the rope body 2 of the spiral form is released to restoringly deform the polyolefinic liner pipe 1 into an original tube shape.

45. 发明专利

JPH11320686A POLYOLEFIN LINER PIPE, ITS MANUFACTURE, AND METHOD FOR EXECUTING 失效
公开(公告)号：JPH11320686A
公开(公告)日：1999-11-24
申请号：JP13906298
申请日：1998-05-21
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , ENOMOTO HIDEKAZU , HARADA TAKATOMO
IPC分类号： F16L1/00 , B29C63/34 , B29L23/00 , F16L9/12
摘要： PROBLEM TO BE SOLVED: To easily continuously mold a polyolefin liner pipe by inserting the pipe without resistance even in a bent pipeline. SOLUTION: The method for manufacturing the polyolefin liner pipe 3 comprises the steps of extrusion molding the melted polyolefin resin in a tubular state, then deforming the pipe 3 so that its tube section becomes flat while the molding remains at a softening temperature or higher, thereby manufacturing the pipe 3, inserting the pipe into an existed tube while heating the pipe 3 to a softening temperature, then applying an internal pressure under heating condition to the softening temperature to recover to expand it to the tubular state.

46. 发明专利

JPH09264477A PIPE JOINT FOR POLYETHYLENE AQUEDUCT PIPE 失效
公开(公告)号：JPH09264477A
公开(公告)日：1997-10-07
申请号：JP7590296
申请日：1996-03-29
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , SAKAMOTO HIROAKI , YOSHIDA YOICHI , KATSURA KAKIYOU , HAMADA KANAME
IPC分类号： F16L21/02 , F16L25/00
摘要： PROBLEM TO BE SOLVED: To assure sufficient strength and improve workability by providing a flange at the first opening of an upper part, a socket at the second opening of a side part and a seal ring on the inner surface of the socket respectively for inserting a short pipe made of polyethylene, and fitting a sleeve to the inner surface of the short pipe. SOLUTION: Openings 18a, 18b and 18c are respectively formed on the upper part, the left side part and the right side part of an approximately T-shaped metal body 16, and a flange 20 is provided at the opening 18a. On the other hand, sockets 24 are formed on the openings 18b and 18c, and two seal rings 28 are fitted at the prescribed interval to the inner surface of each socket 24. In addition, a polyethylene short pipe 32 is inserted in each of the sockets 24, and a sleeve 34 made of metal such as stainless steel is coupled to the inner surface of the short pipe 32. According to this construction, the body 16 is made of metal and sufficient strength can be properly maintained. Also, the polyethylene short pipe 32 is jointed to the socket 24 as integral part thereof and a polyethylene pipe can be easily jointed to the short pipe 32 via an ordinary joint, when a piping work is executed.

47. 发明专利

JPH0988944A SPHERICAL BEARING 失效
公开(公告)号：JPH0988944A
公开(公告)日：1997-03-31
申请号：JP25288195
申请日：1995-09-29
申请人： KUBOTA KK
发明人： KADOWAKI SABURO , YONEDA RYUICHI , HOSHINO TATSUYA
IPC分类号： F16C17/08 , F16C17/24
摘要： PROBLEM TO BE SOLVED: To inexpensively prevent vibration at rotating time by arranging three projections on the same plane orthogonal to the rotary axis on a recessed spherical surface by mutually dislocating them by a specific angle with the rotary axis as the center. SOLUTION: Plural grooves 27 to pass lubricating water are formed in an almost radial shape on a recessed spherical surface 24, and almost semispherical three projections 28a, 28b and 28c are arranged on the same plane orthogonal to the rotary axis A by mutually dislocating them by 120 degrees with the rotary axis A as the center. When a straight line connecting the center B of the recessed spherical surface 24 and the respective centers of the projections 28a, 28b and 28c is denoted by C, a value of an angle θ1 formed by the rotary axis A and the straight line C is preferable to be set not less than 45 degrees so that a movement in the direction orthogonal to the rotary axis A of a spherical bearing 10 can be sufficiently regulated. Such a spherical bearing 10 is installed in a central part of a rotor, and is place on a shaft 20, and the three projections of the spherical bearing 10 contact with an outside surface of the shaft 20, and the rotor rotates in a well-balanced condition with the rotary axis A as the center.

48. 发明专利

JPH04131585A PIPE DETACHMENT PREVENTING MEANS 失效
公开(公告)号：JPH04131585A
公开(公告)日：1992-05-06
申请号：JP25551590
申请日：1990-09-25
申请人： KUBOTA KK
发明人： KYOMEN JUNSUKE , KASHIWABARA JUNJI , KAJIWARA HIDEKI , MATSUMOTO KEIJI , MICHIKADO KEIICHI , YONEDA RYUICHI , OCHI SATOSHI , TAKADA KAZUTAKA
IPC分类号： F16L21/08
摘要： PURPOSE:To save the space and simplify the fitting construction by forming circumferential grooves in a short pipe with one end inner diameter thereof set to receive the outer periphery of a pipe spigot and the other end inner diameter thereof set to receive the opening end outer periphery of a pipe socket, and inserting C-type rings, provided with the inner peripheral faces thereof formed into slip preventing faces and the outer peripheral faces thereof formed into slide faces, into both grooves. CONSTITUTION:The inner diameter of one end 11A is set to the inner diameter d1 for receiving the outer periphery of a pipe spigot A, and the inner diameter of the other end 11B is set to the inner diameter d2 for receiving the outer periphery of a pipe socket B. At the opening ends of a short pipe 11 of different inner diameters d1, d2, circumferential grooves 14A, 14B are formed in such a way that the bottom faces 13A, 13B are tapered toward the pipe end direction (an arrow mark X). Inside the circumferential grooves 14A, 14B, C-type rings 15A, 15B are inserted in such a way that the inner peripheral faces thereof are formed into slip preventing faces that can be brought into contact with the outer faces of the pipe spigot A and the pipe socket B and that the outer peripheral faces thereof are formed slide faces that can be brought into contact with the bottom faces 13A, 13B of the circumferential grooves 14A, 14B. This results in making the whole structure compact, facilitating fitting work and preventing slip-off by the C-type rings.

49. 发明专利

JPH04131584A TUBE JOINT STRUCTURE 失效
公开(公告)号：JPH04131584A
公开(公告)日：1992-05-06
申请号：JP25346290
申请日：1990-09-21
申请人： KUBOTA KK
发明人： KASHIWABARA JUNJI , YONEDA RYUICHI , OCHI SATOSHI , TAKADA KAZUTAKA
IPC分类号： F16L21/02 , F16L21/08
摘要： PURPOSE:To save the space and simplify the fitting construction in a pipe joint formed into such structure that a rubber ring is mounted into a sealing rubber ring fitting groove to insert a spigot so as to press the rubber ring to an annular space by engaging a ring body with the rubber ring, then forming a groove at the ring body, and inserting a C-type ring, provided with a slip preventing face, into the groove. CONSTITUTION:After mounting a sealing rubber ring 2 into a socket 1 provided with a sealing rubber ring fitting groove 1B on its inner face 1A, a spigot 3 is inserted, and the rubber ring 2 is force-inserted between the socket 1 and the spigot 3 to perform sealing. A hard ring body 4 is engaged with the socket opening end side 2A of the rubber ring 2 through locking pieces 4B-4B, and a circumferential groove 5 with its bottom face 5A shallowed in the tapered state toward the socket opening end side is formed on the inner face of the hard ring body 4. Inside the peripheral groove 5, a slip preventing face 6A is provided in such a way that its inner peripheral surface can be brought into contact with the spigot 3, and also a C-type ring 6 is inserted in such a way that its outer peripheral surface formed into a slide face 6B can be brought into contact with the bottom face 5A of the circumferential groove 5. With this constitution, the space saving and the simplification of fitting construction can be accomplished.

50. 发明专利

JPH04107389A PLASTIC PIPE COUPLING 失效
公开(公告)号：JPH04107389A
公开(公告)日：1992-04-08
申请号：JP22622290
申请日：1990-08-27
申请人： KUBOTA KK
发明人： KASHIWABARA JUNJI , YONEDA RYUICHI , OCHI SATOSHI , TAKADA KAZUTAKA
IPC分类号： F16L21/02 , F16L21/00 , F16L21/08
摘要： PURPOSE:To facilitate molding of a socket and to prevent the occurrence of slip off by axially continuously and integrally forming an annular groove which is shallower in a tapered manner from the inner wall on the open side of a rubber ring mounting groove in the direction of an open end, mounting a rubber ring for seal in the rubber ring mounting groove, and inserting a C-shaped ring for preventing slip-off in a manner that size is capable of being reduced. CONSTITUTION:In a plastic pipe coupling 1, an annular groove 4 being shallower in a tapered manner from an inner wall 3A on the open end side of a rubber ring mounting groove 3 in the direction of an open end 2 is axially continuously and integrally formed in the rubber ring mounting groove 3. A rubber ring 5 for seal is mounted in the rubber ring mounting groove 3, and a C-shaped ring 6 for preventing slip-off is inserted in the taperform annular groove 4 in a manner that size is capable of being reduced within the tapered annular groove 4. After coupling of a pipe, when an insertion port A is about to slip off, the C-shaped ring 6 is moved within the annular groove 5 in the direction of an open end togetherwith the insertion port A and wound around the outer surface of the insertion port A reduced in size by means of a component of force in a radial direction generated owing to contact with a tapered bottom. Simultaneously, an axial friction force with the tapered bottom 5A is increased to generate a slip-out resistance force.

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