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1. 发明专利

JPH1138292A OPTICAL FIBER RIBBON CORD 失效
公开(公告)号：JPH1138292A
公开(公告)日：1999-02-12
申请号：JP20742997
申请日：1997-07-17
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SAITO SHIN , SANO AKIRA , MIYAMOTO SUEHIRO , TACHIKURA MASAO , TOMITA NOBUO
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To improve the transmission density of an optical cable and to suppress the distortion of optical fibers which occurs accompanying bending of the optical cable as far as possible, by laminating an even number of coated optical fiber ribbons, embedding these ribbons into a tensile strength fiber group and applying twists to the laminated plural coated optical fiber ribbons. SOLUTION: Four pieces of optical fibers are formed like a ribbon to constitute the coated optical fiber ribbon 1. Two pieces of the coated optical fiber ribbons 1 are laminated and while the twists are applied thereon, the coated fiber ribbons are embedded into the strength fiber groups 2 and are coated by a polyamide sheath 31, by which an optical fiber ribbon cord 41 is constituted. When one piece of the optical fiber ribbon is noticed, the parts receiving compressive force and the parts receiving tensile force eventually exist alternately repetitively. The tensile force and the compressive force are thus offset. Then, two pieces of the laminated coated optical fiber ribbons 1 are extremely flexibly curved regardless of the bending direction of the cable. The distortion of the optical fibers arising accompanying the bending is reduced as far as possible.

2. 发明专利

JPH0511139A FILTER-CONTAINING CONNECTOR 失效
公开(公告)号：JPH0511139A
公开(公告)日：1993-01-19
申请号：JP19059591
申请日：1991-07-04
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： HOSOYA HIDEYUKI , ASANO KENICHIRO , YOKOSUKA HIROSHI , TOMITA NOBUO , TAKASUGI HIDETOSHI
IPC分类号： G02B6/26 , G02B6/00 , G02B6/36 , G02B6/38
摘要： PURPOSE:To easily machine a filter groove where a filter is inserted. CONSTITUTION:The connector consists of a cylindrical ceramic ferrule 4 which holds a terminal 3 of an optical fiber 2 and a flange metal fitting 5 which covers the terminal 3 of the optical fiber 2 at a part exposed from the ceramic ferrule 4, the flange metal fitting 5 puts the terminal 3 in a glass capillary 8, and a filter 6 for controlling a light signal is inserted into a filter groove 10 to cut from this flange metal fitting 5 to the terminal 3 of the optical fiber 2 in the glass capillary 8. Therefore, the filter groove is easily machined in the metal fitting and glass capillary to improve the productivity and workability of the filter-containing connector.

3. 发明专利

JPH04362913A OPTICAL SWITCH 失效
公开(公告)号：JPH04362913A
公开(公告)日：1992-12-15
申请号：JP4080291
申请日：1991-02-14
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE , SUZUKI GIKEN KK
发明人： TAMAKI YASUHIRO , YOKOSUKA HIROSHI , TOMITA NOBUO , TAKASUGI HIDETOSHI , YUMOTO GENMEI
IPC分类号： G02B6/00 , G02B26/08
摘要： PURPOSE:To easily and securely perform high-accuracy positioning adjustment. CONSTITUTION:Positioning pins 4a which have external diameters precisely machined to the moving direction side of a movable plug are arranged and when an optical transmission line 8a is switched, the movable plug 3 moving to the positioning pin 46 is allowed to strike, than stopped to stop the moving operation, thereby accurately position the movable pin 3.

4. 发明专利

JP2001264596A OPTICAL FIBER CORD 失效
公开(公告)号：JP2001264596A
公开(公告)日：2001-09-26
申请号：JP2000073149
申请日：2000-03-15
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： OHASHI KEIJI , KATO OSAMU , SUZUKI RYOJI , URUNO SHIGENORI , TACHIKURA MASAO , TOMITA NOBUO
IPC分类号： G02B6/44 , G02B6/00
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber cord in which an optical loss due to bending of an optical fiber is suppressed small. SOLUTION: The optical fiber cord 10 consists of a coated optical fiber 5 which is an optical fiber 1 with a coating layer 4 on the circumference, plural reinforcement fibers 6 attached along the coated optical fiber, and a sheath 7 covering these coated optical fiber 5 and reinforcement fibers 6. A drawing force for pulling out the coated optical fiber 5 from the optical fiber cord 10 is designed to be 1-100 gf/30 cm, as a drawing force for pulling out the reinforcement fibers 6 from the cord.

5. 发明专利

JPH08184768A OPTICAL SWITCH 失效
公开(公告)号：JPH08184768A
公开(公告)日：1996-07-16
申请号：JP33922994
申请日：1994-12-28
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： FURUKAWA HIROSHI , NOMURA YOSHIKAZU , TOMITA NOBUO
IPC分类号： G02B26/08
摘要： PURPOSE: To surely and stably switch a connection by fixing the leading end part of a moving side optical fiber in a positioning groove, placing the end faces of optical fibers opposite to each other, and then, matching the end faces. CONSTITUTION: After making the moving side optical fiber 3 float up from a V-shaped groove in a free state by detaching a clamper 63 upward, a pulse motor 53 is driven so that a moving head 4 may be moved up to a position where the moving side optical fiber 3 is placed opposite to a desired fixation side optical fiber 2. The leading end part of the moving side optical fiber 3 is moved just above the leading end part of the fixation side optical fiber 2 which should be connected to in such a way. Thereafter, by rotating the clamper 63 by the driving force of a motor 61 and fixing the leading end part of the moving side optical fiber 3 floating up in a horizontal direction in the V-shaped groove by the rear side of the clamper 63 descending from above, the leading end part of the optical fiber 3 is surely and stably connected to the desired fixation side optical fiber 2.

6. 发明专利

JP2001210152A IDENTIFICATION TAG FOR COMMUNICATION LINE AND MANUFACTURING METHOD 失效
公开(公告)号：JP2001210152A
公开(公告)日：2001-08-03
申请号：JP2000021229
申请日：2000-01-31
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SUZUKI RYOJI , OHASHI KEIJI , URUNO SHIGENORI , YAGI YUTAKA , TOMITA NOBUO
IPC分类号： H01B7/36
摘要： PROBLEM TO BE SOLVED: To constitute an identification tag for communication line as a single part to reduce the cost and simplify part management. SOLUTION: This tag 12 having a through hole 12a for passing a communication line has a printing surface for an identification symbol 14 on its one surface and a plate spring 12b springily energized toward the hole 12a is formed on the opposite side as an integral part.

7. 发明专利

JPH04257819A OPTICAL SWITCH 失效
公开(公告)号：JPH04257819A
公开(公告)日：1992-09-14
申请号：JP4094091
申请日：1991-02-12
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE , SUZUKI GIKEN KK
发明人： TAMAKI YASUHIRO , YOKOSUKA HIROSHI , TOMITA NOBUO , TAKASUGI HIDETOSHI , YUMOTO GENMEI
IPC分类号： G02B6/36 , G02B26/02
摘要： PURPOSE:To switch collectively many optical fibers. CONSTITUTION:A couple of positioning plates 12A and 12B which have V-shaped grooves 15 are fixed to a housing 11 in parallel while the V-shaped grooves 15 face each other and a ferrule 2 is fitted to a half as long as the V-shaped grooves 15 in the length direction to clamp a fixed-side ferrule group 4; and A movable-side ferrule group 5 is arranged between the remaining half V-shaped grooves 15 and a presser member 13 which is moved in the opposite directions of the positioning plates 12A and 12B by a switching mechanism 14 while respective ferrules 1 and 2 in the movable-side ferrule group 5 are held collectively is provided between the housing 1 and movable-side ferrule group 5. Then the respective ferrules 1 and 2 in the respective stages of the fixed-side ferrule group 4 and the movable-side ferrule group 5 are positioned by the V-shaped grooves 15 and mutual optical fibers 3 can be connected.

8. 发明专利

JP2001218327A IDENTIFICATION TAG FOR COMMUNICATION LINE AND METHOD OF MANUFACTURING THE SAME 失效
公开(公告)号：JP2001218327A
公开(公告)日：2001-08-10
申请号：JP2000021205
申请日：2000-01-31
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SUZUKI RYOJI , OHASHI KEIJI , URUNO SHIGENORI , YAGI YUTAKA , TOMITA NOBUO
IPC分类号： H02G1/06 , H02G1/00 , H04Q1/04
摘要： PROBLEM TO BE SOLVED: To provide an identification tag which has the advantage of a split- type identification tag in that it can be attached to an arbitrary position of a communication line, and at the same time, is aligned easily for fitting by constituting the tag, in such a way that the lid and the tag body are not disconnected from each other. SOLUTION: This tag is composed of the tag body 22 and lid 24 which holes the communication line 28 when the lid 24 is put on and engaged with the tag body 22 and is marked with an identification symbol. At the joint of both members, a linear housing groove 22b is formed for holding the line 28, and the line 28 is fixed by putting and engaging the lid 24 on and with the tag body 22 in a state, where the line 28 is held in the groove 22b. This tag 20 is formed in one parts by uniting the members 22 and 24 and a hinge section 26 into one body.

9. 发明专利

JP2001091802A MULTIPLE OPTICAL FIBER TAPE WITH TWO-DIMENSIONAL ARRAY OPTICAL CONNECTOR, ITS MANUFACTURING METHOD AND RETAINING MEMBER, FOR MULTIPLE OPTICAL FIBER TAPE 失效
公开(公告)号：JP2001091802A
公开(公告)日：2001-04-06
申请号：JP26776399
申请日：1999-09-21
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE , SUZUKI GIKEN KK
发明人： SHIDA TOMOHITO , NOMURA YOSHIKAZU , HAYASHI YUKIO , FURUKAWA HIROSHI , OSAKI TAKUYA , TOMITA NOBUO , IZUMIDA CHIKASHI , MINE TSUNEJI , KOBAYASHI YOSHIO , KURIHARA SHUICHI
IPC分类号： G02B6/44 , G02B6/04 , G02B6/40 , G02B6/46
摘要： PROBLEM TO BE SOLVED: To prevent the generation of buckling bending in the inner optical fiber tape based on the difference of inner-outer rings of respective optical fiber tapes when the optical fiber tapes whose superposed intermediate parts are retained are bent. SOLUTION: The proper parts in the length direction of the two superposed optical fiber tapes 1 are retained by retaining members 12 while shifting the two optical fiber tapes with each other in the width direction of the tape. On the tip of the tape, a ferrule 4 having optical fiber holes of two-dimensional array (in this case, optical fiber holes which are arranged in transverse two rows) is attached. As the two optical fiber tapes 1 are mutually shifted in the width direction of the tape, the two optical fiber tapes 1 do not form the inner- outer rings to each other when the double optical fiber tapes 15 with an optical connector are bent. When the tapes 15 are bent, therefore, the buckling bending due to the difference of the inner-outer rings does not occur in the inner optical fiber tape 1.

10. 发明专利

JPH1010379A HIGH-STRENGTH OPTICAL FIBER CORD 失效
公开(公告)号：JPH1010379A
公开(公告)日：1998-01-16
申请号：JP15864396
申请日：1996-06-19
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SHIMOMICHI TAKESHI , OHASHI KEIJI , ARAKI SHINJI , TACHIKURA MASAO , TOMITA NOBUO
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To improve mechanical strength and transmission characteristics by providing the periphery of an optical fiber with a tension member layer formed by impregnating the layer with a UV curing resin liquid and curing the resin liquid and providing the periphery of the tension member layer with a specific side pressure resistant layer and scratching resistant layer. SOLUTION: The periphery of the optical fiber 1 is provided with the tension member layer 4 formed by impregnating a transparent long fiber 2 along the longitudinal direction of the optical fiber 1 with the UV curing resin liquid 3 and curing the resin liquid 3. Further, three layers 5a to 5c varying in the Young's modulus are successively laminated on the periphery of the tension member layer 4 to form the side pressure resistant layer 5. The scratching resistant layer 6 having high breaking elongation is formed on the outermost layer. The respective layers 5a to 5c are so formed as to have the high Young's modulus and the preferable Young's modulus is about 2 to 200kgf/mm . Then, the stress loaded on the optical fiber 1 is relieved by the side pressure and bending and the side pressure layer 5 liable to induce brittle fracture is protected.

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