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1. 发明专利

JP2001084851A OPTICAL FIBER COMPOSITE OVERHEAD EARTH-WIRE 失效
公开(公告)号：JP2001084851A
公开(公告)日：2001-03-30
申请号：JP26139999
申请日：1999-09-16
申请人： HITACHI CABLE
发明人： SUMIYA KAZUHIRO
IPC分类号： H01B11/22 , G02B6/44 , G02B6/46
摘要： PROBLEM TO BE SOLVED: To stabilize the transmission loss characteristic by using optical fiber strands positioned at both ends of a tape fiber formed by gathering a number of optical fiber strands as the dummy fiber. SOLUTION: This optical fiber composite overhead earth-wire 4 is formed by stranding up an aluminum-coated steel wire 3 outside of an optical fiber unit 1 and a protective tube 2 of an aluminum pipe accommodating the optical fiber unit 1. The optical fiber unit is formed by arranging four optical fiber strands in parallel in the same plane and accommodating the same in an aluminum spacer by using a four-core bundled tape fiber 6 of which the circumference is coated. A number of tape fibers 6 are accommodated in a groove in a laminated state, a holding wiring 8 is wound on an outer periphery of the spacer 7, the spacer 7 is provided with four grooves at interval of 90 deg. in the circumferential direction, and the tape fibers 7 are accommodated in each groove in a laminated state. By using the strands positioned at both ends of the taper fiber 6 as the dummy fiber 9, the impairing of the optical transmission loss can be prevented.

2. 发明专利

JPH05242741A 失效
公开(公告)号：JPH05242741A
公开(公告)日：1993-09-21
申请号：JP3975792
申请日：1992-02-26
申请人： HITACHI CABLE
发明人： MOMOMOTO SADAKI , NAGAI TAKAYUKI , SUMIYA KAZUHIRO
IPC分类号： G02B6/44 , H01B11/22
摘要： PURPOSE:To improve the elongation distortion effect of optical fibers by covering the peripheries of optical fiber cores for an OPGW with relaxation layers having cushion effect, and stranding the covered cores around a center material axis in a pipe. CONSTITUTION:In an optical fiber elongation distortion relaxation type OPGW 6, center material 1, extending in an axis direction, is established in a shaft center, and plural optical fibers 3, whose silicon coated peripheries are covered with relaxation layers 2, are stranded around the material 1. The layers 2 are formed concentrically in the cross sections thereof around the cores 3 by foaming sponge foaming material having cushion effect. Since a pipe 4, protecting the cores 3 from outside, is established coaxially with the material 1 on the outside of the plural cores 3 covered with the layers 2, the cores 3 covered with the layers 2 are constrained between the material 1 and the inside peripheral wall of the pipe 4. Thereby the elongation distortion relaxation effect of the cores 3 is heightened, and no sectional elongation, torsion and the like of the cores 3 are allowed, so that life is extended and transmission performance can be improved.

3. 发明专利

JP2003187650A OPTICAL FIBER COMPLEX OVERHEAD GROUND WIRE 审中-公开
公开(公告)号：JP2003187650A
公开(公告)日：2003-07-04
申请号：JP2001384799
申请日：2001-12-18
申请人： HITACHI CABLE
发明人： SUMIYA KAZUHIRO , KUMADA TOYOMITSU
IPC分类号： G02B6/44 , H01B11/22
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber complex overhead ground wire with high reliability even in a long-term use through setting of an optimum depth and width of a spacer groove. SOLUTION: With the optical fiber complex overhead ground wire provided with a spacer 17 with grooves formed along the length direction and optical fibers 16 contained in the grooves 18 of the spacer 17, each groove 18 of the spacer 17 is formed to have an interval between its inner face and the optical fiber 16 in a depth d and a width w within the range of 0.167 to 0.2 mm. COPYRIGHT: (C)2003,JPO

4. 发明专利

JP2003185894A COMPOSITE FIBER OPTIC OVERHEAD GROUND WIRE 审中-公开
公开(公告)号：JP2003185894A
公开(公告)日：2003-07-03
申请号：JP2001382974
申请日：2001-12-17
申请人： HITACHI CABLE
发明人： SUMIYA KAZUHIRO , TSUJI TOSHINOBU
IPC分类号： G02B6/44 , H01B11/22
摘要： PROBLEM TO BE SOLVED: To provide a composite fiber optic overhead ground wire having high reliability in a longtime use. SOLUTION: With a proper screening applied on a tape fiber 13, the use of this tape 13 can provide a high reliability for the composite fiber optic overhead ground wire over a long period. COPYRIGHT: (C)2003,JPO

5. 发明专利

JP2002296466A OPTICAL FIBER COMPOSITE OVERHEAD EARTH-WIRE 失效
公开(公告)号：JP2002296466A
公开(公告)日：2002-10-09
申请号：JP2001103422
申请日：2001-04-02
申请人： HITACHI CABLE
发明人： SUMIYA KAZUHIRO , TSUJI TOSHINOBU
IPC分类号： G02B6/44 , H01B11/22
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber composite overhead earth-wire preventing a tape fiber housed in the groove of a spacer from being pulled into a protective pipe and the transmission loss of an optical fiber from increasing even in the case of being spread between steel tower supports with a large height difference. SOLUTION: The optical fiber composite overhead earth-wire is provided with the spacer 17 for which a plurality of the grooves 17s are formed in a longitudinal direction, a plurality of the tape fibers 16 respectively housed inside the grooves 17s of the spacer 17, the protective pipe 12 housing the spacer 17 housing the tape fibers 16, a plurality of conductor wires 13 stranded on the outer periphery of the protective pipe 12 and an adhesive material 19 fixing the tape fibers 16 inside the grooves 17s of the spacer 17 with a fixed interval in the longitudinal direction.

6. 发明专利

JP2002343146A OPTICAL FIBER COMPOUND OVERHEAD GROUND WIRE 失效
公开(公告)号：JP2002343146A
公开(公告)日：2002-11-29
申请号：JP2001148839
申请日：2001-05-18
申请人： HITACHI CABLE
发明人： SUMIYA KAZUHIRO , TSUJI TOSHINOBU
IPC分类号： G02B6/44 , H01B11/22
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber compound overhead ground wire, which gives the stress relief effect to an optical fiber in order to stabilize transmission- loss characteristic of a tape fiber accommodated in a slot of a spacer, has a structure, which can restrain the motion of the tape fiber to some extent, and can prevent permeation of moisture into a pipe by improving airtightness in the protection pipe. SOLUTION: In the gap of the slot of the spacer having a structure, which the spacer is accommodated in the protection pipe, in which elemental wires that constitutes an overhead ground wire are twisted on its outside, and two or more tape fibers are accommodated in the state of laminating in the above spacer, a jelly is filled up with. It is desirable that the above tape fibers may be restricted into the above jelly in the state giving excessive length.

7. 发明专利

JP2002117733A OPTICAL FIBER COMPOSITE OVERHEAD GROUND WIRE 失效
公开(公告)号：JP2002117733A
公开(公告)日：2002-04-19
申请号：JP2000311718
申请日：2000-10-05
申请人： HITACHI CABLE
发明人： SUMIYA KAZUHIRO , KIKUCHI HITOSHI
IPC分类号： G02B6/44 , H01B11/22 , H02G1/02
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber composite overhead ground wire preventing the meandered drawing of an optical fiber unit to be loosely housed with a gap kept in a protecting pipe into the protecting pipe and being hardly affected by drawing elongation. SOLUTION: A material making a coefficient of friction higher than the outer surface of the optical fiber unit to the inner surface of the protecting pipe is installed on the outer surface of the optical fiber unit to be housed with a gap kept in the protecting pipe, and the gap is ensured between the material making a coefficient of friction high and the protecting pipe. The optimum material making a coefficient of friction high is rubber. The material making a coefficient of friction high covers the whole outer surface of the optical fiber unit, but is preferable to be spirally wound at certain intervals in the length direction of the outer circumference.

8. 发明专利

JPH11329109A OPTICAL FIBER COMPOSITE OVERHEAD GROUND WIRE 失效
公开(公告)号：JPH11329109A
公开(公告)日：1999-11-30
申请号：JP15354998
申请日：1998-05-18
申请人： HITACHI CABLE
发明人： SUMIYA KAZUHIRO
IPC分类号： G02B6/44 , H01B11/22
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber composite overhead wire capable of drawing out and replacing an optical fiber unit, and preventing drawing-in of the optical fiber unit-in a condition meandered in a protecting tube. SOLUTION: In this overhead ground wire, an optical fiber unit 1 provided with a plurality of optical element wires 5 is stored in a protecting tube 7 at a prescribed interval, and conductor element wires are twisted on an outer periphery of the protecting tube 7. In this case, it is constituted that ellipse protruberant parts 8 are alternately formed up and down in a longitudinal direction in an inner surface of the protecting tube 7, the optical fiber unit 1 is inserted into the protecting tube 7 wherein a hole is formed in a wavy shape in a longitudinal direction, and the conductor element wires are twisted on the outer periphery of the protecting tube 7.

9. 发明专利

JPH1139962A OPTICAL FIBER COMPOSITE OVERHEAD EARTH-WIRE 失效
公开(公告)号：JPH1139962A
公开(公告)日：1999-02-12
申请号：JP18801797
申请日：1997-07-14
申请人： HITACHI CABLE
发明人： SUMIYA KAZUHIRO , SHIMADA NORIYUKI
IPC分类号： G02B6/44 , H01B11/22
摘要： PROBLEM TO BE SOLVED: To exchange optical fiber unit and to allow not to be drawn meandering into a protection tube by screw machining the outer peripheral face of an optical fiber unit having plural optical fiber strands and the inner peripheral face of the protection tube containing it leaving gaps, and providing catching in a lengthwise direction. SOLUTION: Optical fiber strands 6 are twisted around a core material 5, and secondary coating material 9 is applied to the outside thereof so as to form an OP unit 1. On the outer periphery of an aluminum protection tube 8 having a larger inside diameter than the outside diameter thereof aluminum- coated steel wires 3 are twisted. Female screw type screw machining 81 on the inner face of the protection tube 8 and male screw type screw machining 91 on the surface of the secondary coating material 9 are formed so as to interlock leaving gaps (g). Thanks to a friction effect resulting from the mutual catching of the screw machining 81, 91, the movement of the OP unit 1 in a lengthwise direction is suppressed. The movement of the OP unit 1 is possible to some extend because of the gaps (g) so that elongation is little influenced by metal wheel passing at a drawing time.

10. 发明专利

JP2002277698A STRUCTURE OF SPACER TYPE COMPOSITE OPTICAL FIBER OVERHEAD EARTH WIRE 失效
公开(公告)号：JP2002277698A
公开(公告)日：2002-09-25
申请号：JP2001079689
申请日：2001-03-21
申请人： HITACHI CABLE
发明人： MOMOMOTO SADAKI , SUMIYA KAZUHIRO
IPC分类号： G02B6/44 , H01B11/22
摘要： PROBLEM TO BE SOLVED: To provide a spacer type composite optical fiber overhead earth wire capable of restricting the rotation ribbon type optical fibers stored in the groove of a spacer and suppressing the distortion of the ribbon type optical fibers. SOLUTION: The bottom of the groove of the spacer for storing ribbon type optical fibers is flat and cushioning materials are arranged on the upper and lower stages of the optical fibers. When it is defined that the depth of the groove of the spacer is D, the thickness of each tape type optical fiber is t, the width of the optical fiber is W, the number of optical fibers is n, the thickness of the upper cushioning material is T1 , and the thickness of the lower cushioning material is T2 , the depth of the groove of the spacer is expressed by D +W ] . The pitch of the groove of the spacer is set to 200 to 400 mm.

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