Abstract: An optical fiber fusion splicer includes positioning members and clamping members. Each clamping member clamps the bare fiber. A first guiding portion protrudes from the top surface of each positioning member and guides a distal end portion of the bare fiber toward the groove. A concave face of the first guiding portion has a V-shaped cross section. Each clamping member includes a second guiding portion, which guides a base portion of the bare fiber toward the groove of the corresponding positioning member, and a pressing member, which presses the bare fiber against the top surface of the fiber positioning member. A concave face of the second guiding portion has an inverted-V-shaped cross section. The fusion splicer can clamp bare fibers while the bare fibers are received by the groove.

Abstract: An optical fiber fusion splicer includes optical fiber holders that hold optical fibers. Each optical fiber holder includes a base, a cover, and a connecting portion. The base includes a setting table on which an optical fiber F is placed so as to be oriented in the longitudinal direction of the base. The cover has pressing members that press the optical fiber F placed on the setting table against the setting table. The connecting portion joins the cover to the base such that the cover is openable away from and closeable over the base and movable in the longitudinal direction of the base.

Abstract: An optical fiber reinforcing heating device has a base part, to which a first lid part for covering a sleeve accommodation groove for containing a fiber reinforcement sleeve covering a fusion-splicing part of optical fibers is attached so as to be openable and closable. A pair of fiber holders for holding and securing the optical fibers are disposed on both end sides of the first lid part. Each fiber holder has a second lid part which is attached to a fiber container so as to be openable and closable and presses the optical fiber against the fiber container. A switch lever which is movable longitudinally of the sleeve accommodation groove is disposed on the upper face of the second lid part built in with a pin adapted to move in conjunction with the switch lever. A joint hole adapted to engage the pin is formed within the first lid part.

Abstract: An optical fiber holder includes a holder main body and cord receiving groove. The holder main body has a fiber receiving groove and a first cord receiving groove. The fiber receiving groove receives and positions a coated optical fiber of an optical fiber cord with a cord jacket removed at the tip of the optical fiber cord. The cord receiving groove receives the cord jacket. A cord holding cover and a fiber pressing cover 13 are attached to the holder main body 6 for movement between respective open closed positions. The cord holder cover includes a second cord receiving groove that cooperates with the first cord receiving groove to form an insertion through hole having a circular cross-section that allows for insertion of the optical fiber. The fiber pressing cover presses the coated optical fiber against the holder main body with the coated optical fiber in the fiber receiving groove.

Abstract: A reinforcing member of optical fiber fusion-splicing portion and a reinforcing method thereof are provided, in which plural coated optical fibers can be collectively reinforced in the high density, and a heating mechanism for collective reinforcement can be configured at a low cost. A reinforcing member 12 which reinforces collectively fusion-splicing portions 12a of plural coated optical fibers 11 includes a heat-shrinkable tube 13, a rod-shaped tensile strength member 14 arranged so that a part of its surface comes into contact with an inner surface of the heat-shrinkable tube, and plural tube-shaped heat-fusible adhesive members 15 arranged in the heat-shrinkable tube and into which the fusion-splicing portions of the single-core coated optical fibers are individually inserted. All of the plural tube-shaped heat-fusible adhesive members 15 are arranged in one of space portions formed between the tensile strength body 14 and the heat-shrinkable tube.

Abstract: A holder capable of holding an optical fiber cable without breaking or damaging the cable includes a holder main body, a fiber holding portion, and a cable holding portion. The main body has a groove for receiving the optical fiber exposed from the cable sheath at an end part of the cable, and a portion for receiving the end part of the cable sheath. A positioning surface with which an end surface of the cable sheath can come in contact is provided at the boundary between the fiber receiving groove and the cable receiving part. A fiber holding portion for pressing and holding the optical fiber received by the fiber receiving groove, and a cable holding portion for pressing and holding the cable sheath received by the cable receiving part, are configured so that holding by the cable holding portion is released in conjunction with the release of holding by the fiber holding portion.

Abstract: A spliced optical cable assembly is reinforced at a spliced portion of coated optical fibers to have adequate strength. The spliced optical cable assembly includes: a pair of optical fiber cables in which high-strength fibers are aligned in the longitudinal direction around coated optical fibers. The outer circumference of the coated optical fibers being covered by sheaths. The spliced optical cable assembly further includes a connecting portion in which the pair of optical fiber cables are connected and the coated optical fibers extend from the sheaths. Glass fibers exposed from the coating of the coated optical fibers spliced to each other. The connected portion is covered and formed into an integral unit, together with the high-strength fibers exposed from the sheaths, by a reinforcing tube placed over the optical fiber cables and caused to contract so that both ends of the reinforcing tube engage the sheaths of the respective optical fiber cables.

Abstract: A holder capable of holding an optical fiber cable without breaking or damaging the cable includes a holder main body, a fiber holding portion, and a cable holding portion. The main body has a groove for receiving the optical fiber exposed from the cable sheath at an end part of the cable, and a portion for receiving the end part of the cable sheath. A positioning surface with which an end surface of the cable sheath can come in contact is provided at the boundary between the fiber receiving groove and the cable receiving part. A fiber holding portion for pressing and holding the optical fiber received by the fiber receiving groove, and a cable holding portion for pressing and holding the cable sheath received by the cable receiving part, are configured so that holding by the cable holding portion is released in conjunction with the release of holding by the fiber holding portion.

Abstract: A splice protection heater capable of quickly and efficiently performing a fusion process without an excessive heating time, a fusion splicer including the splice protection heater, and a fusion splicing method are provided. The apparatus has a heating part for heat shrinking a protection sleeve that covers a fusion spliced portion of an optical fiber, a plurality of heating elements that can individually heat a plurality of protection sleeves with different timings by being individually turned ON/OFF by switches, or a heating element turned ON/OFF by a switch. This apparatus may also be provided with detecting section that detects whether or not the protection sleeve is set on the heating element, and turns the switch ON/OFF.

Abstract: The present invention relates to an optical fiber holding apparatus and the like, which has a structure for stably holding optical fibers with a satisfactory force without interfering with other components even when the apparatus is miniaturized. The optical fiber holding apparatus includes a stage for loading a front-end portion of the optical fiber and a lid section for sandwiching the optical fiber together with the stage. The lid section is rotatably connected with one end of an arm, and a fiber holding section is provided at the other end of the arm. The arm extends along the loading direction of the optical fiber and has such a length that the other end thereof is positioned outside of the lid section. Owing to this arrangement, the optical fiber to be held is pressed onto the stage at a further front-end side than the portion sandwiched by the stage and the lid section.

Abstract: The optical fiber fusion-splice device comprises a pair of electric discharge electrodes provided opposed to each other along a predetermined axis, a conductor electrode disposed on one side with respect to a plane with the predetermined axis contained therein, and section for generating electrostatic attraction in the direction tending from the above-described plane toward the one side, between the conductor electrode and the electric discharge path produced between the electric discharge electrodes. The means for generating electrostatic attraction is connected to the conductor electrode. This fusion splicer fusion-splices together the end portions of optical fibers disposed on the other side with respect to the above plane by electric discharge produced between the electric discharge electrodes.

Abstract: A heat-treatment apparatus according to the present invention comprises a sheet-like heating body, which is bent like a letter “U”, and a heat equalizing plate constituted by a metal plate bonded to a heat generating part of the sheet-like heating body. The heat equalizing plate is bonded to the inner surface of the sheet-like heating body bent like a letter “U”. Alternatively, a fluorocarbon resin is coated on the surface of the heat equalizing plate.

Abstract: The present invention relates to an optical fiber holding apparatus and the like, which has a structure for stably holding optical fibers with a satisfactory force without interfering with other components even when the apparatus is miniaturized. The optical fiber holding apparatus includes a stage for loading a front-end portion of the optical fiber and a lid section for sandwiching the optical fiber together with the stage. The lid section is rotatably connected with one end of an arm, and a fiber holding section is provided at the other end of the arm. The arm extends along the loading direction of the optical fiber and has such a length that the other end thereof is positioned outside of the lid section. Owing to this arrangement, the optical fiber to be held is pressed onto the stage at a further front-end side than the portion sandwiched by the stage and the lid section.

Abstract: An object of the present invention is to provide helpful means which enables: genetic applications such as insertion into an expression vector and transformation of a human CaT1 gene; clarification of a calcium absorption activity mechanism such as the presence of a factor affecting the regulation of a calcium absorption activity of human CaT1; and confirmation and new finding of a calcium absorption regulator. Namely, a human CaT1 gene, a plasmid vector thereof, a transformant transformed by the plasmid vector thereof, a method of screening a calcium absorption regulator and a screening kit thereof, and a calcium absorption promoter are provided by the present invention.

Abstract: A splice protection heater capable of quickly and efficiently performing a fusion process without an excessive heating time, a fusion splicer including the splice protection heater, and a fusion splicing method are provided. The apparatus has a heating part for heat shrinking a protection sleeve that covers a fusion spliced portion of an optical fiber, a plurality of heating elements that can individually heat a plurality of protection sleeves with different timings by being individually turned ON/OFF by switches, or a heating element turned ON/OFF by a switch. This apparatus may also be provided with detecting section that detects whether or not the protection sleeve is set on the heating element, and turns the switch ON/OFF.

Abstract: A device for reinforcing an optical fiber fusion spliced part a heating mechanism for heating a protective member and optical fiber clamping mechanisms which are arranged at both sides of the heating mechanism. Relative height positions of the heating mechanism and the optical fiber clamping mechanisms are configured to be changeable.

Abstract: A heat-treatment apparatus according to the present invention comprises a sheet-like heating body, which is bent like a letter “U”, and a heat equalizing plate constituted by a metal plate bonded to a heat generating part of the sheet-like heating body. The heat equalizing plate is bonded to the inner surface of the sheet-like heating body bent like a letter “U”. Alternatively, a fluorocarbon resin is coated on the surface of the heat equalizing plate.

Abstract: The optical fiber fusion-splice device comprises a pair of electric discharge electrodes provided opposed to each other along a predetermined axis, a conductor electrode disposed on one side with respect to a plane with the predetermined axis contained therein, and section for generating electrostatic attraction in the direction tending from the above-described plane toward the one side, between the conductor electrode and the electric discharge path produced between the electric discharge electrodes. The means for generating electrostatic attraction is connected to the conductor electrode. This fusion splicer fusion-splices together the end portions of optical fibers disposed on the other side with respect to the above plane by electric discharge produced between the electric discharge electrodes.

Abstract: A device for reinforcing an optical fiber fusion spliced part a heating mechanism for heating a protective member and optical fiber clamping mechanisms which are arranged at both sides of the heating mechanism. Relative height positions of the heating mechanism and the optical fiber clamping mechanisms are configured to be changeable.