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21. 发明专利

JPH0283508A APPARATUS FOR PRODUCING S AND Z INVERSE TWIST TAPE TYPE OPTICAL FIBER 失效
公开(公告)号：JPH0283508A
公开(公告)日：1990-03-23
申请号：JP23588488
申请日：1988-09-20
申请人： MITSUBISHI CABLE IND LTD
发明人： NAGAE NOBUSADA , IMAMURA KAZUO , TSUJI KOJI
IPC分类号： G02B6/44
摘要： PURPOSE:To surely hold tape type optical fibers into spiral grooves by providing a rotary twisting die which is positioned on the downstream side of a rotary eyeboard in the feed direction of an S and Z compose slot and is provided projectingly with the projecting parts holding the tape type optical fibers on the inside periphery. CONSTITUTION:The tape type optical fibers 5 guided by a stationary eyeboard 15 are further guided by the rotary eyeboard 18 and are inserted into the prescribed spiral grooves 2 by the rotary twisting die 23. The projections of the rotary eyeboard 18, i.e., screws 29 of a fitting body 21 and the projecting parts of the rotary twisting die 23, i.e., screws 29 of a fitting body 26 are fitted into the spiral grooves 2 and, therefore, the rotary eyeboard 18 and the rotary twisting die 23 turn as the S and Z compose slot 1 progresses. The rotating direction thereby inverts at every one rotation. The projections of the rotary eyeboard 18 and the projecting parts of the rotary twisting die 23 are constituted of the screws 29 and, therefore, the amt. of the projections to be fitted into the spiral grooves 2 is optionally adjustable.

22. 发明专利

JP2001019455A PRODUCTION OF BASE MATERIAL FOR OPTICAL FIBER 失效
公开(公告)号：JP2001019455A
公开(公告)日：2001-01-23
申请号：JP19409499
申请日：1999-07-08
申请人： MITSUBISHI CABLE IND LTD
发明人： ITO HIDEAKI , KINOSHITA TAKAAKI , KIN MASATAKA , NAGAE NOBUSADA
IPC分类号： C03B37/012 , G02B6/00
摘要： PROBLEM TO BE SOLVED: To produce a preform for an optical fiber while preventing generation of air bubbles and eccentricity of a core by integrating a glass pipe with a glass rod and drawing them at the same time. SOLUTION: A glass rod 2 as a core or a core and clad is inserted into a glass pipe 1 as a clad to integrate them successively in the axial direction by reducing the diameter of the glass pipe 1 while heating them by a heater and reducing the pressure inside the glass pipe 1. An auxiliary rod 21 having a small diameter and long length is bonded to the end of the glass rod on the integration-terminated side to integrate them in such a state that the distance L between the end of the glass rod and a fixed position of the auxiliary rod is made large. The end of the glass rod on the integration-terminal side becomes movable in the plane crossing the axis at right angles and such a self-aligning effect that the glass rod moves toward the axial center of the glass pipe is obtained by reducing the diameter of the glass pipe, thus preventing the eccentricity of the core.

23. 发明专利

JPH09197146A METHOD FOR PACKAGING OPTICAL FIBER FOR PNEUMATIC CONVEYANCE 失效
公开(公告)号：JPH09197146A
公开(公告)日：1997-07-31
申请号：JP1009396
申请日：1996-01-24
申请人： MITSUBISHI CABLE IND LTD
发明人： KAWAGUCHI SEIJI , NAGAE NOBUSADA , WATABE TAMISHIGE , TSUJI KOJI
IPC分类号： G02B6/00
摘要： PROBLEM TO BE SOLVED: To smoothly pass an optical fiber for pneumatic conveyance through a long pneumatic carrier pipe by winding a conductive protection film around the optical fiber wound around a bobbin. SOLUTION: In the state in which the optical fiber 2 for pneumatic conveyance is wound around the bobbin 1, the conductive protection film 3 is wound around it. As the conductive protection film 3, a film formed by mixing conductor such as aluminum or carbon or an antistatic agent with polymer resin such as vinyl chloride or aluminum foil is usable. The use of a conductive protection film 3 like this prevents the conductive protection film 3 from being stained with dirt sticking on its surface or charged electrostatically since the protection film 3 is conductive, even when the optical fiber 2 for pneumatic conveyance and protection film 3 are rubbed against each other, that the optical fiber 2 for pneumatic conveyance can smoothly be run through the pneumatic carrier pipe.

24. 发明专利

JPH09178989A OPTICAL FIBER UNIT 失效
公开(公告)号：JPH09178989A
公开(公告)日：1997-07-11
申请号：JP33664695
申请日：1995-12-25
申请人： MITSUBISHI CABLE IND LTD
发明人： KAWAGUCHI SEIJI , NAGAE NOBUSADA , WATABE TAMISHIGE , TSUJI KOJI
IPC分类号： G02B6/44 , G02B6/46
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber unit capable of respectively reducing a material cost, weight and frictional resistance and simultaneously lowering transmission loss. SOLUTION: This optical fiber unit 1 is installed after being forcedly fed inside an already installed hollow tube by gas and is composed of plural coated optical fibers 1 arranged parallelly and closely to each other and the respective coated optical fibers 11 are integrally restrained by two string-like bodies 2 wound around the outer periphery of the whole. Also, it is preferable that the two string-like bodies 2 at the time are wound around along the longitudinal direction of the entire coated optical fibers 11 while being crossed and engaged with each other.

25. 发明专利

JPH0990182A PHASE DETECTION DEVICE FOR CENTER MEMBER OF OPTICAL FIBER CABLE 失效
公开(公告)号：JPH0990182A
公开(公告)日：1997-04-04
申请号：JP24275395
申请日：1995-09-21
申请人： MITSUBISHI CABLE IND LTD
发明人： TSUJI KOJI , NAGAE NOBUSADA , TAKEDA TETSUYA
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To prevent detection delay and to precisely detect a phase even if a center member has low twist rigidity. SOLUTION: A circular member 12 is freely rotatably supported to a base 11, and a pin member engaged to the spiral groove of the center member 2 is fitted to the circular member 12 by making it protrude to the inner side of a radial direction. A first gear 123 fixed to the circular member is engaged with a second gear 142 fixed to the operation shaft of a potentiometer. A relative rotation angle from the initial rotation positions of the pin member and the circular member is detected. Coil springs 151 are extended downward from the right/left positions of the circular member in the initial rotation position and they are fitted to the base by fitting arms 153. Equal elastic stress forces are operated on the circular member by a pair of the coil springs. The spring constants of the coil springs are set so that rotary force canceling rotary inertia force accompanied by the rotation of the pin members and the circular member when the deviation of a phase occurs operates on the circular member.

26. 发明专利

JPH0986949A WIRE DRAWING OF OPTICAL FIBER AND APPARATUS THEREFOR 失效
公开(公告)号：JPH0986949A
公开(公告)日：1997-03-31
申请号：JP24275095
申请日：1995-09-21
申请人： MITSUBISHI CABLE IND LTD
发明人： TSUJI KOJI , NAGAE NOBUSADA
IPC分类号： G02B6/00 , C03B37/012 , C03B37/027
摘要： PROBLEM TO BE SOLVED: To provide a wire drawing method of an optical fiber preventing increase in loss percentage according to the wire drawing and increasing efficiency of the wire drawing of the optical fiber by using an optical fiber base material even having a large diameter. SOLUTION: Whole of an optical fiber base material 1 having a large diameter is fused in a first heating furnace 7 and drawn to an optical fiber base material 2 having a thin diameter, then fused in a second heating furnace 11 and subjected to a wire drawing to obtain an optical fiber 3. A drawing force to draw the thinned optical fiber base material and a feeding force to the second heating furnace are applied to the thinned optical fiber base material with keeping the base material to the second heating furnace by pulling means 5 provided in the vicinity of upside of the second heating furnace. The wire drawing of the optical fiber is finished in a state of keeping a dummy bar 1a at a top end of the thinned optical fiber base material after the finish of the drawing and only a residual part 2a can be a lost amount. Positions of whole the first heating furnace and the pulling means are horizontally adjusted to the first heating furnace by a drawing feeding means 10 while the whole is fed at a prescribed feeding speed to the first heating furnace corresponding to the wire drawing.

27. 发明专利

JPH07176223A CABLE WINDING DEVICE 失效
公开(公告)号：JPH07176223A
公开(公告)日：1995-07-14
申请号：JP31976593
申请日：1993-12-20
申请人： MITSUBISHI CABLE IND LTD
发明人： NAGAE NOBUSADA , ISHIKURA MASAYUKI , TAMURA MASAHIRO
IPC分类号： H01B13/00
摘要： PURPOSE:To surely position a cable on the peripheral surface of a drum, and to prevent generation of a winding disorder, by applying tension to the cable in the winding operation by providing a tension applying mechanism. CONSTITUTION:An elevating body 8 is lowered to a drum installing position by a motor 9, a cable drum 101 is installed between grasping members 10, and the drum 101 is raised to a winding position. A cable guide is at the lower end position by a moving mechanism 14, and the upper surface of the belt 28 of a lower side guide 24 is at the height same as the upper end of the peripheral surface 101a of the drum. In this case, the inserting clearances of the self- sustaining type cable 150 are formed inside a lead-in side guide 33, between the belts 28 and 32, and inside a lead-out side guide 43. When the cable 150 is inserted to a guide 12 and the holding of the roller is finished, the cable is conveyed to the winding peripheral surface 101a, and the tip of the cable is fixed to the jaw of the drum 101, and the cable is wound up. At the same time, a load is given to the shaft of a roller 27A by a powder clutch. A sliding board is reciprocated by a traverse mechanism linking with the winding operation.

28. 发明专利

JPH0778523A CABLE COILING APPARATUS AND CABLE COILING METHOD UTILIZING CABLE COILING APPARATUS THEREOF 失效
公开(公告)号：JPH0778523A
公开(公告)日：1995-03-20
申请号：JP22565593
申请日：1993-09-10
申请人： MITSUBISHI CABLE IND LTD
发明人： NAGAE NOBUSADA , ISHIKURA MASAYUKI , TAMURA MASAHIRO , ASAI TADASHI
IPC分类号： B65H54/02 , H01B13/00
摘要： PURPOSE:To prevent coiling disorder in a cable coiling apparatus. CONSTITUTION:The cable coiling apparatus has a cable guide part 12 and a cable guide part evacuating and transporting system 14 wherein while moving relatively and in parallel to the axial center of a cable drum 101 rotated on an axial center, the cable guide part 12 guides a cable 150 to the circumference 101a of the cable drum and the system 14 evacuates and transports the cable guide part 12 to the outside of the cable drum 101. The cable guide part 12 is installed on a tangent line alpha of the cable drum 101 and at the same time its tip is extended to near a cable drum contact point A of the tangent line alpha. While cable coiling process proceeds, the cable guide evacuating and transporting system 14 transports the guide part 12 slightly near the tangent line alpha in the direction in which the part forms right angles to the tangent line alpha.

29. 发明专利

JPH0570185A PRODUCTION OF QUARTZ GLASS-BASED OPTICAL FIBER 失效
公开(公告)号：JPH0570185A
公开(公告)日：1993-03-23
申请号：JP26270891
申请日：1991-09-12
申请人： MITSUBISHI CABLE IND LTD
发明人： ZUSHI TOSHIHIRO , NAKAHARA SHIGERU , NAGAE NOBUSADA , MORISAWA MASAAKI , TANAKA HIROYUKI
IPC分类号： C03C25/42 , G02B6/44
摘要： PURPOSE:To obtain optical fiber, excellent in water and hydrogen resistance and mechanical strength, especially tensile strength and capable of exhibiting improved high performance. CONSTITUTION:A halogenated hydrocarbon or a mixture of the halogenated hydrocarbon with a hydrocarbon is thermally decomposed by utilizing a high temperature of optical fiber just after thermal drawing to coat the optical fiber with carbon.

30. 发明专利

JPS63161418A MANUFACTURING INSTRUMENT FOR TAPE TYPE OPTICAL FIBER CABLE 失效
公开(公告)号：JPS63161418A
公开(公告)日：1988-07-05
申请号：JP31023086
申请日：1986-12-24
申请人： MITSUBISHI CABLE IND LTD
发明人： NAGAE NOBUSADA , YOSHIKAWA MAKOTO
IPC分类号： G02B6/44
摘要： PURPOSE:To manufacture a tape type optical fiber cable with accurate shape by supplying a resin by a cross head to form the tape type optical fiber cable while moving an optical fiber core in the vertical direction. CONSTITUTION:Optical fiber cores 2 drawn out from supply bobbins 1 are turned facedown by a turn sheave 3 and are arrayed in a row at 1mm pitch. Optical fiber cores 2 are naturally centralized to centers in the lengthwise direction of rolls 4 while being guided by rolls 4 and are positioned on plane parts 4a and are arrayed in a row without gaps. A resin 5 hardened by ultraviolet rays is supplied to optical fiber cores 2 arrayed in a row without gaps by a cross head 7, and both of them are unified to form a tape type optical fiber cable 6. The resin 5 hardened by ultraviolet rays is hardened by an ultraviolet ray irradiator 8. Thus, the resin 5 hardened by ultraviolet rays is prevented from being irregularly deformed by gravity in the unhardened state to manufacture the tape type optical fiber with accurate shape.

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