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1. 发明专利

JPH09248812A METHOD FOR FORMING THERMOPLASTIC CEMENT AND APPARATUS THEREFOR 失效
公开(公告)号：JPH09248812A
公开(公告)日：1997-09-22
申请号：JP5944796
申请日：1996-03-15
申请人： ARON KASEI KK , KUBOTA KK , CHICHIBU ONODA CEMENT CORP , CHICHIBU CONCRETE KOGYO KK , TSUTSUNAKA PLASTIC KOGYO , FUKUVI CHEM IND CO , MAEZAWA KASEI KOGYO KK , MITSUI BUSSAN
发明人： YONEDA RYUICHI , YOSHIDA YOICHI , MIKI MAKO , HAMADA KANAME
IPC分类号： C04B28/02 , B28B3/20 , B28B7/42
摘要： PROBLEM TO BE SOLVED: To provide a method and an apparatus for forming a thermoplastic cement capable of being sufficiently hydrated. SOLUTION: A mixed material wherein a thermoplastic resin, cement, and water are mixed is supplied to an extruder 10 with a hopper 12, and the mixed material is compacted in a first mold 18 at a temperature of water boiling point or under with a piston 16 of an oil hydraulic cylinder 14. The mixed material extruded into a second mold 20 is heated with heaters 22, 24 inside and outside the second mold 20. Therefore, the thermoplastic resin is melted to be integrated. The mixed material shaped with a mandrel 26 at an outlet of the second mold 20 is cooled in a third mold 28. Since running short of water for hydration does not occur in the extruder, the cement is effectively hydrated, and can be efficiently formed by using a thermoplastic cement composition.

2. 发明专利

JP2002321281A LINER PIPE AND METHOD FOR MANUFACTURING THE SAME 失效
公开(公告)号：JP2002321281A
公开(公告)日：2002-11-05
申请号：JP2001127515
申请日：2001-04-25
申请人： KUBOTA KK , OSAKA GAS CO LTD
发明人： YONEDA RYUICHI , BAI HIDEKI , HARADA TAKATOMO , OKUMURA HIROSHI , MAEHANE HIROYUKI , YAMADA MASAHIRO
IPC分类号： F16L1/00 , B29C63/34 , B29L23/00
摘要： PROBLEM TO BE SOLVED: To restore a liner pipe so as to have an almost round cross-sectional shape when the liner pipe is restored within an existing pipe, to certainly join a saddle branch joint or the like to the liner pipe at the time of joining, and to restore the liner pipe so as to have a pipe wall uniform in wall thickness over the entire periphery of the liner pipe. SOLUTION: The liner pipe 10 is held in an up and down direction to be made flat so as to get into a folding habit and the flat pipe 10 applying the folding habit thereto is heat-treated at a predetermined temperature, in a folded state to make it possible to prevent restoring force ready to return the flat pipe 10 to the original liner pipe 10 having a circular cross section from acting on the flat pipe 10, when the flat pipe 10 is inserted into the existing pipe having a bent part to be heated. Since the push-in part 20a of the folded pipe 10 is not plastically deformed, the flat pipe can be restored so as to have the round cross-sectional shape by heating and pressing the pipe 10 from the interior thereof and the wall thickness of the push-in part 20a does not become thin.

3. 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.

4. 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.

5. 发明专利

JP2590383B2 失效
公开(公告)号：JP2590383B2
公开(公告)日：1997-03-12
申请号：JP22622190
申请日：1990-08-27
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , OCHI SATOSHI , TAKADA KAZUTAKA
IPC分类号： F16L21/02 , F16L21/08

6. 发明专利

JPH04107388A PLASTIC PIPE COUPLING 失效
公开(公告)号：JPH04107388A
公开(公告)日：1992-04-08
申请号：JP22622190
申请日：1990-08-27
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , OCHI SATOSHI , TAKADA KAZUTAKA
IPC分类号： F16L21/02 , F16L21/08
摘要： PURPOSE:To ensure enough durability even when a high slip-out force is exerted by engaging an annular substance for reinforcement, having an outer surface along a portion extending from an opening end to the inner wall of a socket and an annular groove formed in an inner surface and having a section in a radial direction formed such that a bottom surface is more shallower in the direction of an open end, along the inner wall of the opening end of a socket. CONSTITUTION:A plastic pipe coupling 1 has an outer surface 4A extending along a portion ranging from an opening end 2 to the inner wall of a socket 1' and an inner surface 4B in which an annular groove 5 having a bottom 5A being shallower in a taperform manner from a deep part in the direction of an open end is formed. An annular body 4 having the annular groove is engaged along along the inner wall of the open end of the socket 1'. The annular body 4 for reinforcement has a rear end part 4A' engaged along a recessed inner wall 3A of a rubber ring mounting groove 3. When an external force in the axial direction of a pipe is exerted and slip-out is about to occur, a C-shaped ring 6 is moved within the annular groove 5 in the direction of an open end togetherwith an insertion port A. At the same time when winding around the outer surface of the insertion port A reduced in size along the tapered inner bottom is effected, a contact pressure with the tapered inner bottom 5A is increased and slip-out resistance force is produced.

7. 发明专利

JP2002120287A METHOD FOR PRODUCING SYNTHETIC RESIN RING AND FITTING METHOD 失效
公开(公告)号：JP2002120287A
公开(公告)日：2002-04-23
申请号：JP2000314688
申请日：2000-10-16
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , IRIOKA HIROAKI , MIYAZAKI KEIJI
IPC分类号： F16L21/02 , B29C61/06
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a synthetic resin ring which can be set easily by solving the problem that it is difficult to deform a large diameter ring and a thick ring elastically when they are to be set. SOLUTION: In producing the synthetic resin ring 12, a synthetic resin pipe 10 having a first diameter which is necessary for the ring 12 is made. Next, the pipe 10 is heated, softened, and drawn to expand the pipe 10 to have a second diameter larger than the first diameter. The expanded pipe 10 is cut in the axial direction in a prescribed width to obtain the ring 12. When the produced ring 12 is set in a channel 14, the ring 12 is arranged in the channel 14 of a pipe 16 in which the ring 12 is to be set. Since the inside diameter of the ring 12 is the second diameter which is larger than a part 18 in which the channel 14 is formed and the outside diameter of the pipe end part, the ring 12 is prevented from being caught by the outer surface of the pipe 16. The ring 12 is contracted by heating to have the original first diameter to be set in the channel 14.

8. 发明专利

JP2001020331A REPAIRING METHOD FOR WATER FEED VERTICAL PIPE 失效
公开(公告)号：JP2001020331A
公开(公告)日：2001-01-23
申请号：JP19422899
申请日：1999-07-08
申请人： KUBOTA KK
发明人： YAMADA OSAMI , ISHIKAWA HIROSHI , YONEDA RYUICHI
IPC分类号： E03C1/00
摘要： PROBLEM TO BE SOLVED: To quicken execution of construction in repairing a water feed vertical pipe of a mutli-storied building, by removing an existing deteriorated vertical pipe and inserting a flexible synthetic resin pipe in the space, and connecting a lateral branch pipe to the flexible pipe. SOLUTION: Repairing of a water feed vertical pipe is to be performed within the predetermined amount of suspension time of water supply, taking the living circumstances of residents into consideration, and in the case where the time required for construction work is long, the construction work is separately conducted several times. At the time of construction, with a water feed valve 18 from an elevated tank and a stop cock of each floor closed, a drain valve 32 is opened, thereby discharging water in a water feed vertical pipe 12 (old pipe). Secondly, the old vertical pipe 12 extended to a designated floor is removed, and a new vertical pipe 40a formed of flexible synthetic resin is inserted in that space, and temporarily connected 46, 50 to the remaining old pipe through joints 44, 48. In this case, the new pipe 40a is wound like a coil to be easily transported and be easily inserted in the piping space. After the completion of construction work, the temporary connection 46, 50 are put to final connection. Thus, the construction work can be quickened.

9. 发明专利

JPH11344189A GASKET FOR SNAP TAP WITH SADDLE 失效
公开(公告)号：JPH11344189A
公开(公告)日：1999-12-14
申请号：JP3464899
申请日：1999-02-12
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , SAKAMOTO HIROAKI , FUKUI CHIKANORI
IPC分类号： F16L17/06 , F16L41/02 , F16L41/08
摘要： PROBLEM TO BE SOLVED: To surely maintain the water cut-off ability of a gasket long even if it is used for a pipe for soft water. SOLUTION: This gasket 10 is secured in the gasket containing section 28 of a saddle 16, one of components of a snap tap 14 with saddle. When the snap tap 14 with saddle is fixed to the outer face of a pipe 12, a lip section 44 is pressed against the outer face of the pipe 12, closing a groove 42. Since even in this case, each protruded section 46 formed on the inner face of the groove 42 functions as a spacer, space is always secured in the groove 42. Since a plurality of the protruded section 46 are spacedly formed, an opening port is secured between protruded sections 46. Therefore, during water passing, water enters the deep section of the groove 42 through opening ports, water pressure acts on the top face of the lip section 44. Since through this constitution, force to press the lip section 44 against the outer face of the pipe 12 can be compensated by making water pressure work on the top face of the lip section 44, surface pressure can be reduced by setting the compression margin of the gasket 10 small. Therefore, the deformation of the pipe 12 with the passage of time caused by the restoring force of the gasket 120 can be prevented, and water cut-off ability can be maintained long.

10. 发明专利

JPH11300821A BENDING METHOD FOR FABRICATING POLYOLEFIN PIPE 失效
公开(公告)号：JPH11300821A
公开(公告)日：1999-11-02
申请号：JP11401098
申请日：1998-04-24
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , MIYAZAKI KEIJI
IPC分类号： B29C71/02 , B29C53/08 , B29C53/84 , B29K23/00 , B29L23/00
摘要： PROBLEM TO BE SOLVED: To enable rapid processing of a polyolefin pipe to eliminate a returning deformation and also enhance the accuracy of a bent angle to stabilize the set angle permanently by fabricating the polyolefin pipe by bending the heated part of the pipe at a larger angle than an intended angle after heating the pipe at an softening temperature and again heating the part in an unrestrained state. SOLUTION: The center zone 1A of a polyolefin pipe 1 is heated by a heater at close to 130 deg.C which is a melt point temperature and this heated part 1A is insetted in a mold 2. Further, a bending angle θ at the mold 2 is set at 60 deg. so that an intended bending angle θ is, for example, set at 90 deg. to manufacture a bent pipe 3. Next, the polyolefin pipe 1 is once cooled in such a state that the pipe 1 is insetted in the mold 2, and is removed from the mold 2. After that, the pipe 1 is continuously soaked in a hot water at 60 deg.C for 12 hours. During soaking, the bent pipe 3 is gradually restored to a deformed shape, and after the lapse of about 12 hours, the deformation process comes to a stop to stabilize the shape. In this case, the reheating temperature is at such a high level as exceeding a maximum temperature which is conceivable under circumstances allowing the use of the polyolefin pipe 1. Thus it is possible to perform the thermal treatment rapidly and enhance the accuracy of the bending angle θ.

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