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1. 发明专利

JP2003130278A ELECTRIC FUSION UNIVERSAL JOINT 审中-公开
公开(公告)号：JP2003130278A
公开(公告)日：2003-05-08
申请号：JP2001331956
申请日：2001-10-30
申请人： KUBOTA KK
发明人： SAKAMOTO HIROAKI , IKEDA MITSUO
IPC分类号： F16L47/02 , B29C65/34 , B29L23/00 , F16L27/02
摘要： PROBLEM TO BE SOLVED: To reduce a size and increase the bonding strength of a fused part. SOLUTION: A crossed axes angle θ1 between the second axis 20 of a first receiving port 16 formed in a socket 12 and the first axis 22 of a second receiving port 18 is 10 deg., and a crossed axes angle θ2 between the second axis 20 of an insertion port 34 formed in an insertion port short pipe 14 and the third axis 38 of a second short pipe part 36 is 10 deg.. By rotating the insertion port 34 connected to the first receiving port 16 about the first receiving port 16, a crossed axes angle α between the first axis 22 and the third axis 38 can be changed within the range of 0 to 20 deg.. With each of the first axis 22 and the third axis 38 set at a desired crossed axes angle α, the insertion port 34 is fused to the first receiving port 16 to complete a bent joint. To increase bonding strength between the first receiving port 16 and the insert port 34, a length in the direction parallel with the first receiving port 16 and the second axis 20 of the insertion port 34 is lengthened, and the first receiving port 16 and the insertion port 34 are not necessary to be expanded in the diameter direction.

2. 发明专利

JP2000179777A SNAP TAP WITH FUSED SADDLE 失效
公开(公告)号：JP2000179777A
公开(公告)日：2000-06-27
申请号：JP35737298
申请日：1998-12-16
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , SAKAMOTO HIROAKI , FUKUI CHIKANORI
IPC分类号： F16L41/02 , F16L41/06 , F16L47/02
摘要： PROBLEM TO BE SOLVED: To prevent unnecessary rotation of a snap tap to improve workability and to reduce cost by embedding a metal adaptor with an internal thread in the end connection of a metal snap tap, and thread-fastening an external thread formed at a resin snap tap, to the internal thread to integrate a saddle and the snap tap. SOLUTION: A saddle 16 has a metal adaptor 32 embedded in the upper part of a snap tap end connection 30, and an external thread 42a of a fitting opening 42 and an internal thread 38 of the metal adaptor 32 are thread-fastened to integrate the saddle 16 and a snap tap 18. In the case of branching a water supply pipe 14 from a pipe 12 using the snap tap 10 with the fused saddle, the saddle 16 is first positioned to the outer peripheral surface of the pipe 12 and fixed by a fixing member 24. A current is then applied to a heating body 22 of the saddle 16, and resin around the heating body 22 is heated and fused to fuse the saddle 16 and the pipe 12. A boring jig is inserted through the inside of the snap tap 18 to form a hole 12a in the pipe 12. The water supply pipe 14 is then connected to another fitting opening 44 of the snap tap 18 through joints 50, 52.

3. 发明专利

JP2933257B2 失效
公开(公告)号：JP2933257B2
公开(公告)日：1999-08-09
申请号：JP13423893
申请日：1993-06-04
申请人： KUBOTA KK
发明人： KAJIWARA HIDEKI , MATSUMOTO KEIJI , OCHI SATOSHI , SAKAMOTO HIROAKI , KOSUGI TAKASHI
IPC分类号： F16L21/02 , F16L21/08

4. 发明专利

JPH10196871A SNAP TAP WITH SADDLE FOR RESINOUS TUBE 失效
公开(公告)号：JPH10196871A
公开(公告)日：1998-07-31
申请号：JP292997
申请日：1997-01-10
申请人： KUBOTA KK
发明人： SAKAMOTO HIROAKI , YOSHIDA YOICHI , HAMADA KANAME
IPC分类号： F16L41/08
摘要： PROBLEM TO BE SOLVED: To ensure sufficient watertightness of a snap tap with a saddle even after its use for a longer period. SOLUTION: A resinous tube 12 and a snap tap 18 with a saddle 20 are positioned to each other by means of an insert core 36, which comprises a first locking part 36a adapted to be locked on a step difference 24b situated at the lowermost inner face of a vertical tube 24 in the snap tap 18, and a second locking part 36b adapted to be locked into a branch hole 12a formed through the resinous tube 12. That arrangement prevents the resinous tube 12 from being deformed radially inward by bearing pressure acting on a gasket 22 fitted into a groove 20a cut in the mounting surface of the saddle 20 and by residual stress of the resinous tube 12 itself, which ensures the sufficient functions of the gasket 22.

5. 发明专利

JPH109473A DIFFERENT DIAMETER CHEESE WITH TRANSITION FLANGE AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH109473A
公开(公告)日：1998-01-13
申请号：JP16274896
申请日：1996-06-24
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , SAKAMOTO HIROAKI , YOSHIDA YOICHI , HAMADA KANAME , KATSURA KAKIYOU
IPC分类号： F16L23/04 , B29D99/00 , B29K23/00 , F16L41/08 , F16L47/06 , B29D31/00
摘要： PROBLEM TO BE SOLVED: To prevent breakage of pipe line in a branch part for preventing generation of water leakage accident by integrally forming a short pipe with a metal flange and a polyethelene cheese, and thereby receiving the load applied on the flange at the metal body of cheese as well as the flanged short pipe. SOLUTION: A cheese 14 made of polyethelene and a short pipe 16 with a metal flange 34 made of iron or the like are integrally formed, and a branch pipe part 14b of the cheese 14 is formed as an insertion part into a fitting part 22 of the pipe 16. A tapered part 24 is formed which gradually reduces in its dia. from an upper end of the fitting part 22 while a short pipe part 26 extends straight from an upper end of the tapered part 24. The load applied to the flange 34 is received by the whole of the cheese 14 as well as the pipe 16. Accordingly breakage of pipe line in a branch part is prevented, resulting in prevention of water leakage accident in the branch part.

6. 发明专利

JP2000334779A METHOD FOR INJECTION MOLDING AND MOLD FOR INJECTION MOLDING 失效
公开(公告)号：JP2000334779A
公开(公告)日：2000-12-05
申请号：JP14778099
申请日：1999-05-27
申请人： KUBOTA KK , NANIWA KOSAKUSHO KK
发明人： YONEDA RYUICHI , SAKAMOTO HIROAKI , SUZUKI KOSUKE , YOSHIDA YOICHI
IPC分类号： B29C45/27 , B29C45/26
摘要： PROBLEM TO BE SOLVED: To uniformize heat shrinkage of an molded article and to improve dimentional accuracy. SOLUTION: A resin injected from an injection molding machine is fed into the first ring part 32 of a ring gate 20 through a resin passage 24 and fluctuation of flow rate of the resin is relaxed in the first ring part 32 with changed height and a communication path 34 and fluctuation of the flow rate of the resin is furthermore relaxed in the second ring part 36 and a gate part 38. Therefore, at a stage where the resin is filled in a cavity 14 from the gate part 38, the apex positions of the resin in the axial direction are arranged in a line and the resin is prevented from flowing in the peripheral direction in the cavity 14.

7. 发明专利

JP2000205482A SLIPPAGE PREVENTIVE TOOL OF SPLIT COUPLER 失效
公开(公告)号：JP2000205482A
公开(公告)日：2000-07-25
申请号：JP1197799
申请日：1999-01-20
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , SAKAMOTO HIROAKI , FUKUI CHIKANORI
IPC分类号： F16L41/06
摘要： PROBLEM TO BE SOLVED: To prevent leakage on a connecting part of a pipe and a snap tap with a saddle. SOLUTION: An irregular part of a slippage preventive member is engaged with an outer surface of a pipe 12 when a metal split ring 16 is installed on the outer surface of the pipe 12. Since a metal split ring 16a is installed on the pipe outer surface by making contact with an end part of a snap tap 14 with a saddle, when the snap tap 14 with the saddle is likely displaced in the axial direction against the pipe 12, the metal split ring 16a functions as a stopper of the snap tap 14 with the saddle. Additionally, as the two metal split rings 16a, 16b are connected to each other by a bolt 18, their interval L is always held constant. Consequently, an outside diameter of the pipe 12 is held constant as the pipe 12 is never extended and contracted in diameter at a point where the snap tap 14 with the saddle is installed.

8. 发明专利

JPH09264469A CONVERSION JOINT FOR DIFFERENT TYPES OF PIPES 失效
公开(公告)号：JPH09264469A
公开(公告)日：1997-10-07
申请号：JP7590196
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： F16L19/02 , F16L21/00 , F16L25/00 , F16L47/06
摘要： PROBLEM TO BE SOLVED: To prevent the reduction of a flow rate by applying the constitution that the inner diameter of a polyethylene short pipe inserted in the socket of a metallic body is made uniform over axial entire length. SOLUTION: A polyethylene short pipe 30 formed to have an outer diameter approximately equal to the inner diameter of a socket 22 and a uniform inner diameter over axial entire length is inserted therein. Furthermore, a sleeve 32 made of metal such as stainless steel and formed to have an outer diameter slightly larger than the inner diameter of the short pipe 30 is coupled to the internal surface thereof. In this case, the short pipe 30 is expanded in diameter, due to the sleeve 32, and the external surface of the short pipe 30 comes to closely adhere to the internal surface of the socket 22, thereby keeping the short pipe 30 fixed in the socket 22. Also, the inner diameter of the short pipe 30 is made uniform over axial entire length and, therefore, the reduction of a cross sectional area for a water flow can be prevented, thereby preventing a drop in a flowrate at the time of flowing water.

9. 发明专利

JP2003130265A SOCKET WITH BUILT-IN RELEASE PREVENTOR AND RELEASE PREVENTIVE RING 审中-公开
公开(公告)号：JP2003130265A
公开(公告)日：2003-05-08
申请号：JP2001327481
申请日：2001-10-25
申请人： KUBOTA KK
发明人： KAKEHASHI KOICHIRO , SAKAMOTO HIROAKI , NAKAMURA AKIRA , INAI TOMOAKI , NAKAMURA RYOICHIRO
IPC分类号： F16L21/08
摘要： PROBLEM TO BE SOLVED: To easily inspect the rolling of a rubber ring since a recessed part is formed in a ring, and re-connect by extracting an insertion port from a socket since a release preventive ring can be easily diametrally expanded. SOLUTION: The release prevention ring 34 and the rubber ring 28 are installed in the socket 16 in this order from an opening edge 16a side, and four recessed parts 42 are formed in the inner surface of the ring 34. When the rubber ring 28 is checked for its rolling, a check gauge 56 is inserted from the opening edge side of the socket 16, and the tip thereof is pressed against the side surface of the rubber ring 28 through the recessed parts 42. When the ring 34 is diametrally expanded, the tip of a first diameter increasing tool is inserted from the opening edge side of the socket 16, and the projected part at the tip thereof is pressed into the recessed parts 42.

10. 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.

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