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1. 发明专利

JP2002340253A CONNECTING STRUCTURE OF PIPE AND PIPE CONNECTING METHOD 失效
公开(公告)号：JP2002340253A
公开(公告)日：2002-11-27
申请号：JP2001143175
申请日：2001-05-14
申请人： TOTAKU IND
发明人： MASUI HIROYUKI , MACHINO TATSUYA , HIRAO SHOJI , FUJII AKIHIRO , NAKAMATA KEIJI
IPC分类号： F16L21/04 , F16L21/02
摘要： PROBLEM TO BE SOLVED: To connect pipes to each other or a pipe and a joint by restraining the occurrence of connecting failure. SOLUTION: The end part of a drain pipe 1 formed of crystalline polyolefin resin is softened by heating to be expanded outward in the radial direction, and the end part of the joint 5 in which a cylindrical shape retaining material 10 is fitted is inserted in the end part of the expanded drain pipe 1. After that, the end part of the drain pipe 1 is formed and contracted by heating to be abutted on the end part of the joint 5, and subsequently contracted by crystallization to be pressed thereto, whereby while deformation of the joint 5 is prevented by the shape retaining material 10, the drain pipe 1 and the joint 5 are connected to each other.

2. 发明专利

JP2006322491A SYNTHETIC RESIN PIPE BODY 审中-公开
公开(公告)号：JP2006322491A
公开(公告)日：2006-11-30
申请号：JP2005144961
申请日：2005-05-18
申请人： TOTAKU IND
发明人： KIKUMORI YASUHIRO , FUJII AKIHIRO
IPC分类号： F16L11/11 , H02G9/06
摘要： PROBLEM TO BE SOLVED: To provide a synthetic resin pipe body having resistance to vertical bending pressure on a pipe wall having a certain distance from the pipe end to be connected and fixed in piping attitude while maintaining flexibility in most part. SOLUTION: The pipe body P has the pipe wall 1 formed in an irregular shape with protruded portions 2 and recessed portions 3 alternately arranged along the pipe axial direction. One or both of the outer peripheries of the recessed portions 3, 3 at a required pitch from the pipe end, vertically positioned in piping attitude, ribs 4, 4 are formed ranging from the longitudinal side wall faces 2a, 2a of the adjacent protruded portions 2, 2. Otherwise, one or both of the outer peripheries of the protruded portions 2, 2 at a required pitch from the pipe end, vertically positioned in piping attitude, cavity portions 5, 5 are formed ranging all over the width of the protruded portion 2 in the pipe axial direction. COPYRIGHT: (C)2007,JPO&INPIT

3. 发明专利

JP2002267050A PERFORATED TUBE, AND MANUFACTURING DEVICE AND MANUFACTURING METHOD THEREOF 失效
公开(公告)号：JP2002267050A
公开(公告)日：2002-09-18
申请号：JP2001068412
申请日：2001-03-12
申请人： TOTAKU IND
发明人： MASUI HIROYUKI , MACHINO TATSUYA , HIRAO SHOJI , FUJII AKIHIRO , NAKAMATA KEIJI
IPC分类号： E02B11/00 , A01G25/02 , E03F1/00 , E03F3/04 , F16L9/06 , F16L9/12
摘要： PROBLEM TO BE SOLVED: To provide a perforated tube with excellent water sucking discharging performance, and a manufacturing device and a manufacturing method thereof capable of rapidly manufacturing the tube at a low cost. SOLUTION: In the tube constituted by winding a tape in a spiral manner, a hole opening part (13) for opening a recess, a notch, or a hole in the tape (2) formed by a tape forming part (11) is disposed between the tape forming part (11) and a tube forming part (12), and the tape (2) is continuously formed, the holes (6) are continuously formed, and the tube (1) is continuously formed. The holes (6) are formed in predetermined shape by the extension from the tube forming part (12) side. In the tube (1) formed thereby, a circumferential wall part of the hole (6) is gradually thin-walled toward an outer circumferential surface of the hole.

4. 发明专利

JP2003232479A CORRUGATED PIPE CONNECTING STRUCTURE 审中-公开
公开(公告)号：JP2003232479A
公开(公告)日：2003-08-22
申请号：JP2002030722
申请日：2002-02-07
申请人： TOTAKU IND
发明人： MASUI HIROYUKI , MACHINO TATSUYA , FUJII AKIHIRO
IPC分类号： F16L33/00 , F16L21/06 , F16L33/28 , F16L47/02
摘要： PROBLEM TO BE SOLVED: To secure watertightness well by preventing the formation of a clearance between the overlapped sheet end parts of a cut-off sheet wound across the end parts of corrugated pipes. SOLUTION: The cut-off sheet 20 is wound in a roll state around the outer peripheries of the end parts of the corrugated pipes 10, 10 arranged facing each other, straddling the end parts. The sheet end parts 21, 22, extending along the pipe axis direction, of the cut-off sheet 20 are overlapped with each other, and in the state of interposing a plate member 30 formed of hard synthetic resin or the like, between the sheet end parts 21, 22, the cut-off sheet 20 is pressed from the outside to mount a joint member 40 across the end parts of the corrugated pipes 10, 10. COPYRIGHT: (C)2003,JPO

5. 发明专利

JP2002147663A PIPE JOINT, PIPING STRUCTURE OF PROTECTIVE PIPE FOR CABLE, AND PIPING METHOD OF PROTECTIVE PIPE FOR CABLE 失效
公开(公告)号：JP2002147663A
公开(公告)日：2002-05-22
申请号：JP2000349011
申请日：2000-11-16
申请人： TOTAKU IND
发明人： MASUI HIROYUKI , MACHINO TATSUYA , FUJII AKIHIRO , NAKAMATA KEIJI
IPC分类号： F16L21/06 , F16L1/024 , H02G1/06 , H02G9/06
摘要： PROBLEM TO BE SOLVED: To improve the workability by easily connecting pipe ends abutted on one another, and to ensure the water-tightness. SOLUTION: One end side of a cylindrical packing 3 is externally fitted to one pipe end part, the other end side of the cylindrical packing 3 is overlappingly folded to one end side, in this condition, an end face of one pipe end part and an end face of the other pipe end part are faced and abutted on one another, the other end side of the folded cylindrical packing 3 is externally fitted to the other pipe end part, and a joint member 5 is mounted over the pipe end parts in a state of holding the cylindrical packing 3 from the outside.

6. 发明专利

JP2003161397A BRANCH COUPLING AND CONNECTION STRUCTURE OF TUBE USING THE SAME 审中-公开
公开(公告)号：JP2003161397A
公开(公告)日：2003-06-06
申请号：JP2001359241
申请日：2001-11-26
申请人： TOTAKU IND
发明人： FUJII AKIHIRO
IPC分类号： E03F3/04 , E03F5/00 , F16L41/02 , F16L41/08
摘要： PROBLEM TO BE SOLVED: To provide a branch coupling for simply and further securely connecting a branch tube and a main tube in a drainage pipe of a culvert underdrain or the like. SOLUTION: The branch coupling (15) is integrally formed with one end (16) inserted into a connecting hole (7) which is formed at a tube wall (6) of a main tube (1) and the other end portion (17) joined to an end portion of the branch tube (10), and upon an end portion (16) made it possible to elastically deform, is bulged with a plurality of locking protrusions (20), (21) to prevent the coming-off of the connecting hole (7) of the end (16) by abutting on the inside surface around the connecting hole (7) when the main tube (1) is inserted into the connecting hole (7) and by suitably spacing to run along the shape of the connecting hole (7) of the main tube (1). COPYRIGHT: (C)2003,JPO

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