Sumitomo Electric Industries, Limited

Sei Optifrontier Co., Ltd.

Japan Communication Accessories Manufacturing Co., Ltd.

Nippon Telegraph and Telephone Corporation

Sumitomo Electric Lightwave Corp.

Sumitomo Electic Lightwave Corp.

Takayasu Yamauchi

Takayuki Yokochi

Tomohiko Ueda

Yukihiro Yokomachi

Daizo Nishioka

Kenichiro Ohtsuka

Takashi Kondo

Kazuya Masuda

Masanori Yamanaka

Yoshinobu Toda

Kenichi Suzuki

Tomoyuki Yokokawa

Keisuke Okada

Junji Fukui

Keiichiro Sugimoto

Katsuyuki Aihara

Eisuke Oki

Tsuneari Ito

Yoshio Ukita

Shinichi Niwa

Shinsuke Niiyama

Hideaki Tajima

Tomomi Imakawa

An optical fiber rack includes: a rack part on which a plurality of termination units arranged along an up-down direction are located; an optical fiber housing part which has a back plate and in which an extra length wiring part in a plurality of optical fiber bundles connected to each of the plurality of termination units is housed; and a plurality of first dividing bodies for dividing locations of the optical fiber bundles in the optical fiber housing part, the plurality of first dividing bodies being attached to the back plate so as to be arranged along the up-down direction in the optical fiber housing part. The first dividing body has a holding part for holding the corresponding optical fiber bundle, and the holding part of the first dividing body provided lower in the up-down direction is positioned to be separated from the back plate.

Fiber optic cable rack

A tray unit includes: a plurality of trays each of which has a protrusion at a side end portion thereof; and a pair of frames vertically provided with a plurality tiers of rail portions, the plurality of tiers of rail portions accommodating the plurality of trays in a slidable manner in a horizontal direction. And the rail portion at each tier include a clamp on a surface facing the side end portion of the tray, the clamps in the plurality of tiers are aligned in a vertical direction, the clamp has an opening to which the protrusion is fittable, and when the side end portion of the tray move to a predetermined position with respect to the rail portion, the clamp is elastically deformed in the vertical direction of the rail portion, and the protrusion is fitted into the opening.

Tray unit

An optical fiber rack includes a rack part on which a plurality of termination units arranged in a vertical direction are located, a first optical fiber housing part in which extra length wiring parts of a plurality of first optical fibers connected with each of the plurality of termination units are housed, a second optical fiber housing part in which an extra length wiring part of a second optical fiber connected with any of the termination units is housed, and a partition plate partitioning the first optical fiber housing part from the second optical fiber housing part.

Optical fiber rack

A termination unit located on a rack part of an optical fiber rack includes a housing a plurality of first optical fibers located in the housing, the plurality of first optical fibers being fusion spliced to a multi fiber cable introduced from an outside of the optical fiber rack, an adapter group including a plurality of adapters in a line in the housing, the plurality of adapters being respectively connected to the plurality of first optical fibers on an inside of the housing and being respectively connected to a plurality of second optical fibers on an outside of the housing, and an optical fiber passing part through which at least one optical fiber is configured to pass, the optical fiber passing part being located in at least one of: the adapter group, and between the housing and the adapter group in an arrangement direction.

Termination unit and optical fiber exchange method using the same

A termination unit to be located on a rack part of an optical fiber rack includes a housing, a plurality of first optical fibers located in the housing and fusion spliced to a multi fiber cable introduced from an outside of the optical fiber rack, a plurality of external connection adapters located in a line in a first direction, and in which the plurality of first optical fibers are respectively connected to the plurality of external connection adaptors on an inside of the housing, a guide part located on one side surface of the housing crossing the first direction, and extending in a second direction crossing the first direction, and a fixing member attached to the one side surface of the housing, and to which the multi fiber cable is fixed. The fixing member is movably attached along the guide part.

Termination unit

An optical fiber rack includes a rack part on which a plurality of termination units are located, a first optical fiber housing part in which extra length wiring parts of a plurality of first optical fibers are housed, a second optical fiber housing part in which an extra length wiring part of a second optical fiber connected with any of the plurality of termination units is housed, a partition plate partitioning the first optical fiber housing part from the second optical fiber housing part, and, a plurality of optical fiber guides attached to the partition plate and arranged in the vertical direction. The optical fiber guide comprises a first guide part housing the first optical fibers toward to the first optical fiber housing part, and a second guide part housing the second optical fiber passing through an opening provided in the partition plate.

An optical cable gripping member which prevents the kinds of splicing devices from being diversified, thereby enabling reduction of the labor of component management and lowering of the production cost to be realized is obtained. In a cable gripping memberwhich is to be attached to a splicing deviceto hold an optical fiber cablefrom its outer sheath, a spacerwhich fills a gap between one inner wall surfaceof a tubular spacethrough which the optical fiber cableis to be passed, and the spacerin the tubular spaceis formed monolithically with one end of the one inner wall surfacein a manner that the spaceris attachable to and detachable from the one inner wall surface. The spaceris attached to or detached from the one inner wall surface, thereby enabling a plurality of optical fiber cables of different sizes to be held.

Optical cable gripping member

An optical connector assembling jig and an optical connector assembling method includes an optical connection. The optical connector assembling jig includes a base and a guide. The base is provided in a longitudinal direction with an accommodation groove for accommodating an optical fiber, and a rear pressing member for restraining a rear part of the optical fiber accommodated in the accommodation groove. The rear part is set apart from an embedded fiber. The guide has a front holding portion for holding a front part of the optical fiber accommodated in the accommodation groove. The front part is near the embedded fiber, and the guide is capable of moving in the longitudinal direction. Moving the base toward the optical connector causes the intermediate section of the optical fiber to separate from the accommodation groove and bend. By moving the base further toward the optical connector, a buffered fiber in the optical fiber can be connected to the embedded fiber.

Optical connector assembling jig and optical connector assembling method

There is provided an optical-connector-equipped optical fiber cable introducing method, according to which an introducing operation through an existing electrical wiring conduit or the like can be implemented, without damaging an optical fiber cable to be introduced, and with a small towing force. When inserting into a conduitan optical-connector-equipped optical fiber cablein which a griphaving a function of engaging with and disengaging from an adaptor is fitted onto a plug framethat covers a ferrule, an introducing operation of the optical-connector-equipped optical fiber cable is implemented by towing and inserting the optical-connector-equipped optical fiber cable, from which at least the gripis detached, through the conduitand, thereafter, the gripis attached to the plug frame

Optical fiber cable equipped with optical connector, method for introducing optical fiber cable, towing tool used in introducing method, and optical connector

An optical connector has a simple structure and a method of attaching an optical fiber cord to the connector is easy. The connectorincludes: a plug partwhich has a capillaryprovided at the front and containing a built-in optical fiberand which includes a mechanical splicing portioncapable of allowing an optical fiberto be inserted from the rear so as to be fixed therein; a caulking standcapable of holding a sheath by radially contracting in a state in which the optical fiber cordis inserted therein; a caulking ringprovided outside the cylindrical portionof the standso as to hold the tension memberbetween the ringand the standand a coupling bodyprovided behind the plug partand accommodating the standand the ring

Growing community of inventors

Osaka, Japan

Takayasu Yamauchi