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11. 发明专利

JP2002103425A METHOD FOR MANUFACTURING SPLIT CORRUGATED PIPE 失效
公开(公告)号：JP2002103425A
公开(公告)日：2002-04-09
申请号：JP2000296782
申请日：2000-09-28
申请人： KUBOTA KK
发明人： IRIOKA HIROAKI , MIYAZAKI KEIJI
IPC分类号： B29C48/90 , B29C48/32 , H01B7/17 , B29C47/90 , B29C47/20
摘要： PROBLEM TO BE SOLVED: To simply manufacture a split corrugated pipe of good accuracy by a series of processes including extrusion molding without deforming both end parts in the peripheral direction thereof and to dispense with a secondary processing process. SOLUTION: At first, a plain pipe 32 having a split shape is extruded from the outlet 30 having a semi-circular arc shape of a mold 28 and pressed to the molding surfaces having a corrugated shape of mold blocks 38 and 40 to mold the pipe wall of the plain pipe into a corrugated shape.

12. 发明专利

JP2002098268A CORRUGATED SYNTHETIC RESIN TUBE AND RING 失效
公开(公告)号：JP2002098268A
公开(公告)日：2002-04-05
申请号：JP2000290042
申请日：2000-09-25
申请人： KUBOTA KK
发明人： IRIOKA HIROAKI , MIYAZAKI KEIJI , OSHIMA SADAO , EGI HIDEYUKI , WATANABE FUMIHIRO , TASHIRO YOSHITAKA
IPC分类号： F16L33/00 , F16L9/06 , F16L33/28 , H02G1/06 , H02G3/04 , H02G9/06
摘要： PROBLEM TO BE SOLVED: To prevent a corrugated synthetic resin tube from coming off by combining functions of a groove and a ring. SOLUTION: A receiving part 12 is formed on one end of a corrugated synthetic resin tube 10 and an insertion part 14 is formed on the other end. A ring 22 is attached adjacently to the insertion part 14 and a groove 24 is provided adjacently to the receiving part 12. When the insertion part 14 of the corrugated synthetic resin tube 10 is inserted in the receiving part 12, the groove 24 receives the ring 22.

13. 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.

14. 发明专利

JPH102459A POLYETHYLENE PIPE FOR WATERLINE 失效
公开(公告)号：JPH102459A
公开(公告)日：1998-01-06
申请号：JP15508396
申请日：1996-06-17
申请人： KUBOTA KK
发明人： NISHIMURA MASAKAZU , MIKI MAKO , MIYAZAKI KEIJI
IPC分类号： E03C1/01 , C08K3/26 , C08K3/34 , C08L23/06 , F16L9/12
摘要： PROBLEM TO BE SOLVED: To prevent infiltration of oil odor while maintaining flexibility. SOLUTION: An inorganic filler 20 is mixed in a second polyethylene layer 16 to fill amorphous part pores in the second polyethylene layer 16, so that oil in contaminated soil can be shut out by the second polyethylene layer 16. Oil odor can thereby be prevented from infiltrating into a polyethylene pipe 10, and since the whole is formed of flexible polyethylene, flexibility is not impaired.

15. 发明专利

JP2003116209A MULTIPLE CABLE PROTECTIVE PIPE 审中-公开
公开(公告)号：JP2003116209A
公开(公告)日：2003-04-18
申请号：JP2002151829
申请日：2002-05-27
申请人： KUBOTA KK
发明人： IRIOKA HIROAKI , MIYAZAKI KEIJI , UEDA KAZUNORI
IPC分类号： F16L11/12 , H02G1/06 , H02G9/06
摘要： PROBLEM TO BE SOLVED: To make a space for custody small as compared with the case where protective pipes are wound one by one around a reel so as to be convenient for carriage, and to reduce labor in laying work by drawing out three pieces, for example, of protective pipes together prior to laying, and also to reduce the execution cost of works by making the sectional area of an excavated ditch for laying small. SOLUTION: The three pieces of protective pipes 12 can be wound in a lump around the reel and the three pieces of protective pipes wound around the reel can be drawn out together from the reel 12 prior to laying since the three pieces of protective pipes 12 are in contact with each other and are bound together, with each contact point becoming a fused part 14. The sectional area of the excavated groove for laying can be made small since the three pieces of protective pipes 12 are in contact with each other and are bound together.

16. 发明专利

JPH11300822A BENDING PROCESSING OF POLYOLEFIN PIPE 失效
公开(公告)号：JPH11300822A
公开(公告)日：1999-11-02
申请号：JP11401198
申请日：1998-04-24
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , MIYAZAKI KEIJI
IPC分类号： B29C53/08 , B29C53/84 , B29K23/00 , B29L23/00
摘要： PROBLEM TO BE SOLVED: To rapidly treat a polyolefin pipe subjected to bending processing in order to eliminate the returning deformation thereof after processing and to enhance the accuracy of a bending angle to permanently stabilize the angle. SOLUTION: A polyolefin pipe 1 is heated to softening temp. to be fitted in a mold 2 at its heated part to be subjected to bending processing so as to obtain an objective bent angle and the bent polyolefin pipe 1 is reheated while fitted in the mold and subsequently cooled in this state to be demolded.

17. 发明专利

JPH102462A POLYOLEFIN PIPE FOR WATERLINE AND WATER PIPELINE USING POLYOLEFIN PIPE 失效
公开(公告)号：JPH102462A
公开(公告)日：1998-01-06
申请号：JP15508196
申请日：1996-06-17
申请人： KUBOTA KK
发明人： NISHIMURA MASAKAZU , MIKI MAKO , MIYAZAKI KEIJI
IPC分类号： F16L9/14 , F16L58/08 , F16L58/16
摘要： PROBLEM TO BE SOLVED: To prevent oil odor from shifting into a pipe without worsening workability and earthquake resistance. SOLUTION: The periphery of a pipe body 12 is formed of polyolefin resin so as to be full of flexibility, and wound with an aluminium tape 14 leaving joint margins A at both ends to form an outer layer. A thus formed polyolefin pipe 10 for waterline is buried as a water pipeline in an area with soil contaminated with oil, or an area with such concern. Accordingly, even though oil reaches the periphery of the polyolefin pipe 10, the oil is shut out by the aluminium tape 14 to prevent the pipe body 12 from coming in direct contact with the oil and swelling, and the flexible property of the pipe body 12 is not impeded by the aluminium tape 14 forming the outer layer of the pipe body 12.

18. 发明专利

JPH09250676A MANUFACTURING METHOD OF PIPE WITH FUSED FAUCET 失效
公开(公告)号：JPH09250676A
公开(公告)日：1997-09-22
申请号：JP5713496
申请日：1996-03-14
申请人： KUBOTA KK
发明人： SAKAGUCHI MASAYUKI , KADOWAKI SABURO , MATSUZAKI MOTOSUKE , MIYAZAKI KEIJI
IPC分类号： F16L47/06 , H05B3/44
摘要： PROBLEM TO BE SOLVED: To facilitate manufacturing of a pipe with a fused faucet by installing a heater in a state where a pipe end part is softened, inserting a core covered with a sleeve on the heater in the pipe end part, thereafter, extracting the sleeve and burying the heater by melting the pipe end part. SOLUTION: In case of manufacturing a pipe 10 with a fused faucet constituted by burying a heater 18 in an end part of a pipe main body 12, the heater 18 is installed on a molding part 24 of a core 20, and its outer periphery is covered with a thin part 34 of a sleeve 32. Thereafter, after an end part of a pipe 12' is softened, the end part is put over a guide part 26 of the core 20, it is put over the thin part 34 while expanding its diameter by a tapered part 28, and its head end is made contact with a contact part 36. Thereafter, when the sleeve 32 is extracted, the pipe 12' adheres to the molding part 24, and continuously a work coil is arranged in the circumference of the molding part 24, and the heater 18 is heated by switching on a high frequency electric source. Thereby, the pipe 12' is melted, and the fused faucet 16 is completed by filling melted resin in a clearance of the heater 18.

19. 发明专利

JP2002218638A POWER CABLE PROTECTION TUBE AND ITS PROTECTION COLLAR 失效
公开(公告)号：JP2002218638A
公开(公告)日：2002-08-02
申请号：JP2001014489
申请日：2001-01-23
申请人： KUBOTA KK
发明人： IRIOKA HIROAKI , MIYAZAKI KEIJI
IPC分类号： F16L11/04 , F16L11/11 , H02G1/06 , H02G9/06
摘要： PROBLEM TO BE SOLVED: To form serrations 16 in a spiral direction on the inner layer 14 and an edge 26, which comprise the opening of grooves 16, so as to protrude against the direction 28 of cable inserting. SOLUTION: When a cable is inserted into a power cable protection tube in its inserting direction, by this way the length of the power cable protection tube can be made longer than the conventional one. The number of handholes and construction cost can be reduced. Because the cable protection tube are disposed so that the cable insertion direction is reverse to the running direction of cars, the movement of the cable by surfing phenomenon can be controlled.

20. 发明专利

JP2002195458A PIPE PAD FOR CORRUGATED SYNTHETIC RESIN PIPE 失效
公开(公告)号：JP2002195458A
公开(公告)日：2002-07-10
申请号：JP2000400015
申请日：2000-12-28
申请人： KUBOTA KK
发明人： IRIOKA HIROAKI , MIYAZAKI KEIJI
IPC分类号： F16L3/02 , F16L3/22 , F16L3/223 , H02G1/06 , H02G9/06
摘要： PROBLEM TO BE SOLVED: To reduce an execution cost by performing burying without generating a waviness in corrugated synthetic resin pipes, even when a back filing of sediment is carried out in a state in which the corrugate synthetic resin pipes are stacked in a plurality of stages inside a groove formed on the ground. SOLUTION: Since projections 22, 22 at an upper stage side for being fitted to the groove of the corrugated synthetic resin pipe arranged at the upper stage and projections 26, 26 at a lower stage side for being fitted to the groove of the corrugated synthetic resin pipe arranged at the lower stage are provided, a movement of each of the corrugated synthetic resin pipes in the axial direction is restrained even when an external force is applied to each of the pipes.

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