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1. 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.

2. 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.

3. 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.

4. 发明专利

JPH10109297A DRILL BIT FOR RESIN PIPE 失效
公开(公告)号：JPH10109297A
公开(公告)日：1998-04-28
申请号：JP26578596
申请日：1996-10-07
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , SAKAMOTO HIROAKI , YOSHIDA YOICHI , HAMADA KANAME
IPC分类号： B26D7/18
摘要： PROBLEM TO BE SOLVED: To trap chips in a body to prevent chips from being scattered in a pipe by providing a cover which covers a slit at the position above the lower end of a bit and whose outer diameter is smaller than the maximum rotation diameter of the bit. SOLUTION: An external thread 22 formed on a rotation shaft 16 is screwed into an internal thread 24 formed on the upper inner surface of a body 18 to fix a drill bit 10 to the rotation shaft 16. The pipe wall of a resin pipe 12 is cut circularly by the bit 30 by rotating the rotation shaft 16 and the drill bit 10 manually or by driving a motor. The chips of resin pipe 12 remain in the body 18 but they are trapped in the body 18 and are not discharged because the bottom opening of the body 18 is closed by part of the cut pipe wall and a slit 26 is covered by a cover 34. After a hole 14 is drilled, the drill bit 10 is pulled out from the hole 14 and a disc-shaped cut part and chips inserted in the body 18 are removed.

5. 发明专利

JPH10185063A SNAP TAP WITH SADDLE 失效
公开(公告)号：JPH10185063A
公开(公告)日：1998-07-14
申请号：JP20567697
申请日：1997-07-31
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , SAKAMOTO HIROAKI , YOSHIDA YOICHI , HAMADA KANAME
IPC分类号： F16L41/08 , F16L47/02
摘要： PROBLEM TO BE SOLVED: To improve workability by rotating an adapter against a saddle under a condition that a cap nut which is screwed around a male screw and has a pushing/ pressing part by which a flange is pushed and pressed to the end surface of a short pipe part, is loosened, and adjusting the direction of a snap tap connected to the adapter. SOLUTION: On end part of an adapter 20 is fitted to the inner circumferential surface of a short pipe part 30. A cap nut 22 is screwed around the male screw 32 of the short pipe part 30, and also the male screw 48 of a snap tap 18 is screwed in the female screw 58 of the adapter 20. When a water supply pipe 14 is connected to a main pipe 12 by using a snap tap 10 with a saddle, the faying surface of the saddle 16 is tightly stuck to the peripheral surface of the main pipe 12. Subsequently, a resin is heated and melted by using a current-carrying device, and the saddle 16 and the main pipe 12 are fused. When a fused part is cured, the adapter 20 and the snap tap 18 are rotated under a condition that the cap nut 22 is loosened, so that the direction of the snap tap 18 can be adjusted. Then, the cap nut 22 is fastened and a flange 60 is pushed and pressed to the upper end surface of the short pipe part 30 by a pushing/pressing part 22a, thereby the adapter 20 and the snap tap 18 can be fixed to the saddle 16.

6. 发明专利

JPH10132183A FERRULE PROVIDED WITH SADDLE 失效
公开(公告)号：JPH10132183A
公开(公告)日：1998-05-22
申请号：JP29240696
申请日：1996-11-05
申请人： KUBOTA KK
发明人： YONEDA RYUICHI , SAKAMOTO HIROAKI , YOSHIDA YOICHI , HAMADA KANAME
IPC分类号： F16L41/06
摘要： PROBLEM TO BE SOLVED: To easily perform punching work to a distributing water pipe while securing water stopping performance. SOLUTION: A ferrule 20 is fixed to a saddle 16 to be attached to a distributing water pipe 12 through an adapter 18. A punching blade 28 is arranged on the inner surface of an inner short pipe 25 of the adapter 18 formed of a double short pipe structure through thread parts 24a, 28a so as to be moved in the vertical direction. The punching blade 28 is vertically moved by fitting and turning a tool not shown in the figure to a hexagonal hole 28b of the punching blade 28. The distributing water pipe 12 is punched, and the distributing water pipe 12 and a water supplying pipe 14 are communicated with each other through a pipeline formed among a branch hole 46, an outer short pipe 22 of the adapter 18, and the inner short pipe 24.

7. 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.

8. 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.

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