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1. 发明专利

JPH10306896A FIXING METHOD OF ELECTRICALLY WELDED SADDLE JOINT AND JIG THEREFOR 失效
公开(公告)号：JPH10306896A
公开(公告)日：1998-11-17
申请号：JP33306697
申请日：1997-12-03
申请人： SEKISUI CHEMICAL CO LTD , MITSUI CHEMICALS INC , OSAKA GAS CO LTD , MITSUBISHI PLASTICS IND
发明人： KOJIMA KENICHIRO , SUGIYAMA KAZUTO , MATSUNO SUMIO , UEDA HIROSHI , IIZUKA KENJI , FURUKAWA JOJI , YOSHIDA OTOO
IPC分类号： F16L41/08 , F16L47/02 , H05B3/48
摘要： PROBLEM TO BE SOLVED: To fix an electrically welded saddle to a resin pipe relatively easily and surely by connecting holders to the joint after putting a saddle part onto a thermoplastic resin pipe using the holders consisting of a flexible or expansible member, and fastening and fixing the thermoplastic resin pipe by means of the joint and holder. SOLUTION: This electrically welded saddle joint is constituted of a saddle part 3 and a branch pipe connecting part 4 projectingly provided from the saddle part 3 and connecting a branch pipe thereto, and an electron beam connected to terminals 6 is buried on the joint face of the saddle part 3 with a thermoplastic resin pipe 5. For electrically welding the electrically welded saddle joint with the thermoplastic resin pipe, when the joint 7 is fixed to the pipe 5, after hooking the one end ring 2 of a rubber band 1 with the terminal 6, the other end ring 2 is pulled, the ring 2 on the other end is hooked with the terminal 6 for connection, while pressing the rubber band 1 around the pipe 5 and the joint 7 under the condition of stretching out. This work is executed on both side of the branch pipe connecting part 4, and hence the joint 7 is fixed to the pipe 5.

2. 发明专利

JPH063256A METHOD FOR TESTING CHEMICAL RESISTANCE OF SYNTHETIC RESIN TUBE 失效
公开(公告)号：JPH063256A
公开(公告)日：1994-01-11
申请号：JP16110192
申请日：1992-06-19
申请人： SEKISUI CHEMICAL CO LTD
发明人： KOJIMA KENICHIRO , TANAKA KISABURO
IPC分类号： G01N3/00 , G01N17/00
摘要： PURPOSE:To provide a easy test method for chemical resistance of synthetic resin tube which can be easily performed in a short test time and can test a number of test pieces in one time. CONSTITUTION:A test piece 1 is cut off from a circular tube, a round through hole 2 with the intersection as a center is provided in the center of gravity of the test piece 1, and a bar 3 is forcedly fitted into the through hole 2 from the surface side to the reverse side. A turn to the reverse side is formed on the periphery of the through hole 2, and the state where a tensile stress is added to the periphery can be revealed. Thus, the test piece 1 into which the bar 3 is penetrated is installed into a test tank in which a test fluid is infected, and exposed to the test fluid, whereby the test for evaluating the resistance in the test fluid under a fixed tensile deformation can be performed.

3. 发明专利

JPH05312714A 失效
公开(公告)号：JPH05312714A
公开(公告)日：1993-11-22
申请号：JP12325792
申请日：1992-05-15
申请人： SEKISUI CHEMICAL CO LTD
发明人： KOJIMA KENICHIRO
IPC分类号： G01N5/00 , G01N17/00 , G01N33/44
摘要： PURPOSE:To obtain a chemical-resistance testing apparatus which can obtain the positive testing result as to the resistance to chemicals, with allowing vari ous kinds of tubular bodies in the wide range as a test tube and without leaking a fluid outside even if the test tube is broken or at the similar accident. CONSTITUTION:A test tube T is detachably incorporated in a piping route R to transport a fluid. A fluid leakage preventing cover 4 is provided at the outer peripheral surface of the test tube T. The cover 4 consists of a cover 5 of a tubular body and a cover 6 of a joint part. When tightening bolts 3, 13 are screwed via sealing rubber plates 12, 16, a sealing rubber tube 15, etc., the test tube T is tightly completely shut from outside by the fluid leakage preventing cover 4.

4. 发明专利

JPH0599824A ABRASION TESTER FOR INSIDE OF SYNTHETIC RESIN PIPE 失效
公开(公告)号：JPH0599824A
公开(公告)日：1993-04-23
申请号：JP25905391
申请日：1991-10-07
申请人： SEKISUI CHEMICAL CO LTD
发明人： KOJIMA KENICHIRO , SAWADA HIROYUKI
IPC分类号： G01N3/56
摘要： PURPOSE:To obtain an abrasion tester which can provide conditions approximating actual working conditions and test the abrasion resistance of the inside of a synthetic resin pipe under those conditions for the purpose of checking whether the pipe body of the synthetic resin pipe has a sufficient abrasion resistance or not, in the case when the pipe is employed for transportation of a fluid containing hard powder bodies such as earth and sand. CONSTITUTION:In a tester, a pipe-shaped test piece is fitted in a test piece holding case 7 disposed in the middle of a circulating pipeline R and an abrasive composed of powder bodies and a dispersion liquid is charged in an abrasive holding tank 1. The abrasive, which is agitated sufficiently by operating an agitator 4 constantly, is sent into the circulating pipeline R continuously from a pump 5 and made to circulate, the test piece is taken out of the test piece holding case 7 after passage of a prescribed time, the weight thereof is measured and the amount of abrasion thereof is calculated.

5. 发明专利

JPH1026281A CLAMP FOR ATTACHING THERMOPLASTIC RESIN PIPE AND BRANCH SADDLE 失效
公开(公告)号：JPH1026281A
公开(公告)日：1998-01-27
申请号：JP18049596
申请日：1996-07-10
申请人： SEKISUI CHEMICAL CO LTD
发明人： KOJIMA KENICHIRO
IPC分类号： F16L3/10 , F16L41/04
摘要： PROBLEM TO BE SOLVED: To allow a worker to confirm that a torque wrench receives reaches a fixed torque by sound securely and obtain fixed tightening force irrespective of worker's skill by constituting in such a manner that sound is generated when torque which the torque wrench consisting of a lever and a cam receives reaches fixed torque. SOLUTION: When a branch saddle 6 is attached to a pipe 5, the branch saddle 6 is put on the pipe 5 by putting fringe parts 61, 62 of the branch saddle 6 below suppressing pieces 20, 21, respectively. When a lever 32 is turned in the direction in which it rises in this condition, a cam 31 rotates to push down the suppressing piece 21. At this time, the fringe part 61 on one side is suppressed by the suppressing piece 20, and the fringe part 62 on the other side is pressed by the suppressing piece 21 so that the branch saddle 6 adheres to the pipe 5 closely. Moreover, at this time, when the cam 31 presses down the suppressing piece 21 to a fixed position and a torque wrench 3 receives fixed torque, sound is generated from a sound generation device which is built in the cam 31 and is connected with a torque detector so that a worker confirms that it reaches predetermined pressing force based on the sound.

6. 发明专利

JPH07125085A HOT AIR HEATING DEVICE FOR SYNTHETIC RESIN TUBE 失效
公开(公告)号：JPH07125085A
公开(公告)日：1995-05-16
申请号：JP27944993
申请日：1993-11-09
申请人： SEKISUI CHEMICAL CO LTD
发明人： KOJIMA KENICHIRO , OKUNISHI FUMINAO
IPC分类号： F16L47/02 , B29C35/04 , B29C71/02 , B29L23/00
摘要： PURPOSE:To heat a synthetic resin tube by hot air smoothly even under the working environment of strong wind in order to prevent the cracks to be formed by low temperature fragility of a synthetic resin tube when the synthetic resin tube is laid underground by excavating the underground. CONSTITUTION:A flexible hose 2 is connected with an outlet of a hot air generator 1 having a heater 12 and a fan 11, and a pad 3 being brought into contact through a hot air flowing clearance is installed at the end of the flexible hose 2 on a face to be heated, a temperature sensor 5 is installed on the inner face side of the pad 3, and a control section 15 for controlling the fan 11 by means of the output of the sensor 5 is provided.

7. 发明专利

JP2001050468A FUSION JOINT 失效
公开(公告)号：JP2001050468A
公开(公告)日：2001-02-23
申请号：JP22410999
申请日：1999-08-06
申请人： SEKISUI CHEMICAL CO LTD
发明人： KOJIMA KENICHIRO
IPC分类号： B29C65/34 , F16L41/03 , F16L47/02
摘要： PROBLEM TO BE SOLVED: To perform a plurality of branch operations from one service tee, and freely select the branch direction according to a condition of an execution field by arranging a receiving port in which a resistance heating wire is disposed on an inner circumferential surface side of one end part of a joint main body, and arranging a plurality of branch connecting parts on the other end part. SOLUTION: A lower surface of a saddle part 31 of a service tee 3 abuts on a prescribed position of an outer peripheral surface of a main pipe 2, and is fixed thereto. Current is carried to a nichrome wire arranged on a lower surface side of the saddle part 31 through both terminals 311, and the saddle part 31 is fused with the main pipe 2. A spigot 34 protruded to a side of a barrel part 32 disposed upward from the saddle part 31 is fused with a receiving port 12. Both branch connecting part 15 positioned on upper and lower parts is fused with a branch pipe. At this time, the connecting direction of each elbow for 90 degrees is changed, and thereby, branch directions of both branch pipes are optionally changed. The fusion joint 1 is assembled with the service tee 3, and thereby, two branch piping operations are carried out from one service tee 3.

8. 发明专利

JPH11218286A ELECTRODEPOSITION JOINT 失效
公开(公告)号：JPH11218286A
公开(公告)日：1999-08-10
申请号：JP14309998
申请日：1998-05-25
申请人： SEKISUI CHEMICAL CO LTD
发明人： TOKUMARU TAKESHI , KOJIMA KENICHIRO
IPC分类号： F16L47/02 , B29C65/34 , B29L23/00 , B29L31/24
摘要： PROBLEM TO BE SOLVED: To shorten a molding cycle to improve productivity, and carry out connection surely by forming a heating element on a conductive sheet, in an electrodeposition joint which the heat element is arranged in the vicinity of a surface of a joint main body. SOLUTION: An electrodeposition joint of a socket type is composed of a joint-main body 1 and a heating element 2 of a conductive sheet shape. The heating element 2 is made of polyethylene(PE) resin formed by uniformly mixing and dispersing carbon black, and terminal pins 31, 31 for current-carrying are connected to a part of ring shaped electrode plates 3, 3 mounted on outer peripheral surfaces of both ends of the heating element 2. In the case of use, PE pipes 4, 4 are inserted in sockets of both end parts of the electric fusion joint, and current-carrying is carried out through power supply codes connected to the terminal pins 31, 31. The carbon black in the heating element 2 is heated, the PE resin formed around the carbon black and the outer surface layers of both PE pipes 4 are fused, and the electric fusion joint and both PE pipes are fusing connected to each other so as to provide a connecting part not having a defect part and having a good air tightness.

9. 发明专利

JPH10185068A FIXING METHOD OF ELECTRIC FUSION COUPLING 失效
公开(公告)号：JPH10185068A
公开(公告)日：1998-07-14
申请号：JP34381196
申请日：1996-12-24
申请人： SEKISUI CHEMICAL CO LTD
发明人： KOJIMA KENICHIRO
IPC分类号： F16L41/08 , F16L47/02 , H05B3/48
摘要： PROBLEM TO BE SOLVED: To provide a fixing method of electric fusion coupling which not only can be fixed to a thermoplastic resin pipe even though a clamp jig is not available, but also can be processed simply, can bear some level of impact, and can be molded easily. SOLUTION: To a branch saddle 2 with an about circular arc form cross section, a branch pipe connection 3 to connect a branch pipe to a thermoplastic resin pipe 5 is provided, a heating wire for thermal fusion is buried, and after an electric fusion coupling 1 in which a metal plate 4 is buried along the peripheral direction is covered on the outer periphery of a thermoplastic resin pipe 5, the side end of the metal plate 4 is smashed and plastic deformed, so as to fasten the electric fusion coupling 1 and the thermoplastic resin pipe 5.

10. 发明专利

JPH10160080A ELECTRIC FUSION JOINT 失效
公开(公告)号：JPH10160080A
公开(公告)日：1998-06-16
申请号：JP32142396
申请日：1996-12-02
申请人： SEKISUI CHEMICAL CO LTD
发明人： KOJIMA KENICHIRO , TOKUMARU TAKESHI
IPC分类号： F16L47/02
摘要： PROBLEM TO BE SOLVED: To provide an electric fusion joint which can be fixed onto a thermoplastmc resin pipe without using a clamp jig, attain easy formation and is excellent in durability. SOLUTION: This joint 1 is constituted so that a branch pipe may be connected to a pipe to be fused, and consists of a branch saddle with a short pipe of half-split type which is fixed at one half part of the outer periphery part of a thermoplastic resin pipe and is connected to the branch pipe, and a retaining member with a short pipe of half-split type which is fixed at the other half part of the outer periphery part of the thermoplastic resin pipe. A heating coil for heat fusion is embedded in the branch saddle 2. A fitting part 6 is provided on at least either of the branch saddle 2 or the retaining member, and a locking part 5 which is inserted and locked in the fitting part 6 is provided on the other.

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