JP2016212153A - Terminal treatment of pc steel - Google Patents

Terminal treatment of pc steel Download PDF

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JP2016212153A
JP2016212153A JP2015093211A JP2015093211A JP2016212153A JP 2016212153 A JP2016212153 A JP 2016212153A JP 2015093211 A JP2015093211 A JP 2015093211A JP 2015093211 A JP2015093211 A JP 2015093211A JP 2016212153 A JP2016212153 A JP 2016212153A
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steel
case
optical fiber
strand
fitted
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JP6481981B2 (en
Inventor
及川　雅司
Masashi Oikawa
雅司 及川
山田　眞人
Masato Yamada
眞人 山田
松原　喜之
Yoshiyuki Matsubara
喜之 松原
山本　徹
Toru Yamamoto
徹 山本
山野辺　慎一
Shinichi Yamanobe
慎一 山野辺
道男 今井
Michio Imai
道男 今井
直樹 曽我部
Naoki Sogabe
直樹 曽我部
一正 大窪
Kazumasa Okubo
一正 大窪
一芳 千桐
Kazuyoshi Chigiri
一芳 千桐
小林　俊之
Toshiyuki Kobayashi
俊之 小林
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Kajima Corp
Sumitomo SEI Steel Wire Corp
Hien Electric Industries Ltd
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Kajima Corp
Sumitomo SEI Steel Wire Corp
Hien Electric Industries Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a terminal treatment of PC steel capable of improving attachment strength between an optical fiber and a connector.SOLUTION: A terminal treatment structure of PC steel provided with an optical fiber over the entire length of PC steel P includes a connector 20 attached on a terminal of the optical fiber, and a case 30 covering a boot 24 of the connector 20. On a terminal of the PC steel, a projection having a smaller diameter than a diameter of the terminal is formed, and one end of the case 30 is fitted into the projection. The case has a groove in an axial direction formed in a columnar body, and a recess 33 into which the projection formed on an end face of the body is fitted. The groove has a portion into which the boot of the connector is fitted and a portion into which the terminal of the optical fiber projecting from the boot is fitted. The projection has the same axial center with the PC steel, and if the PC steel is a stranded wire, the projection is a center strand.SELECTED DRAWING: Figure 1

Description

本発明は、光ファイバを備えたＰＣ鋼材の端末処理構造、その端末処理方法及びその処理方法に使用するコネクタ支持ケースに関するものである。   The present invention relates to a terminal processing structure of PC steel material provided with an optical fiber, a terminal processing method thereof, and a connector support case used in the processing method.

プレストレスト・コンクリート (ＰＣ: prestressed concrete)構造物に導入されるプレストレス力（緊張力）は、ＰＣ鋼材の端部におけるそのＰＣ鋼材の伸び量により管理されているのが現状である。この管理手法は、ＰＣ構造物の内部におけるＰＣ鋼材全長に亘りプレストレスが正しく導入されているかが把握できない問題がある。
また、地山等の補強に採用されるアンカー工の場合、ＰＣ鋼材端部の固定金具部（定着体）にロードセル等の圧力計を設け、地山等に生じる局部的な割れや滑りが生じた場合、その割れ等によるＰＣ鋼材のプレストレス力変化を前記圧力計が検知し、その検知圧力の変動によって地山等に生じる局部的な割れや滑りを把握するようにしているが、その割れ等が生じた位置を特定することができない。 The prestressed concrete (PC: prestressed concrete) structure is currently managed by the amount of elongation of the PC steel at the end of the PC steel. This management method has a problem that it is difficult to grasp whether prestress is correctly introduced over the entire length of the PC steel in the PC structure.
In the case of anchors used for reinforcement of natural ground, etc., a pressure gauge such as a load cell is provided in the fixing bracket (fixed body) at the end of the PC steel material, causing local cracks and slips that occur in natural ground. In this case, the pressure gauge detects the change in the prestress force of the PC steel material due to the cracks, etc., and grasps local cracks and slips that occur in the natural ground due to fluctuations in the detected pressure. It is not possible to specify the position where the occurrence or the like has occurred.

このため、ＰＣ鋼材の全長に亘って光ファイバを添わせ、プレストレス力によるＰＣ鋼材の動き（伸長）に連動する光ファイバのひずみ測定からＰＣ鋼材のひずみ（緊張力）を測定する技術がある（特許文献１参照）。
この技術は、地山等において、局部的に割れや滑りが生じた場合、その部位の光ファイバもその割れ等によって張力（歪み）が変動するため、その位置及びその張力変化を検出できる。 For this reason, there is a technique for measuring the strain (tensile force) of the PC steel from the strain measurement of the optical fiber that is linked to the movement (elongation) of the PC steel due to the prestressing force along the entire length of the PC steel. (See Patent Document 1).
In this technique, when a crack or slip is locally generated in a natural ground or the like, the tension (strain) of the optical fiber at that portion also fluctuates due to the crack or the like, so that the position and change in the tension can be detected.

この光ファイバを添わせたＰＣ鋼材においては、その端末に至った光ファイバの端末に外部機器への接続用コネクタを取り付けている。
そのコネクタは、光ファイバを保持するフェルールと、そのフェルールを収容するフレームと、そのフレームを収容するとともに相手側のアダプタに接続されるプラグハウジングと、プラグハウジングから保持された光ファイバの所要長さを被うブーツ等とからなる（特許文献２段落００１７〜同００４６、図１等参照）。 In the PC steel material to which this optical fiber is attached, a connector for connection to an external device is attached to the end of the optical fiber leading to the end.
The connector includes a ferrule that holds an optical fiber, a frame that contains the ferrule, a plug housing that contains the frame and is connected to a mating adapter, and a required length of the optical fiber that is held from the plug housing. (See Patent Document 2, paragraphs 0017 to 0046, FIG. 1, etc.).

特開２０００−４６５２７号公報JP 2000-46527 A 特開２０１２−１５５３１６号公報JP 2012-155316 A

上記ＰＣ鋼材に添わせた光ファイバにコネクタを接続する際、光ファイバがＰＣ鋼材の端末の周縁（角）に接触して損傷する恐れがある。このため、その接続作業はその損傷が生じないように注意深くする必要があり、作業性が悪い。
また、上記光ファイバを添わせ、かつその端部にコネクタを接続したＰＣ鋼材をコンクリートや定着体内に挿通する場合は、そのＰＣ鋼材の端末に保護カバー（図１、図３Ｃの符号：４０参照）等を取り付ける必要があるが、保護カバー内でＰＣ鋼材に対しコネクタは自由に動き得る（図３Ｂ参照）。このため、挿通作業中に、コネクタの動きに伴って光ファイバが動いて折れたり、ＰＣ鋼材の端末に接触したりして損傷する恐れがある。 When a connector is connected to the optical fiber attached to the PC steel material, the optical fiber may come into contact with the peripheral edge (corner) of the end of the PC steel material and be damaged. For this reason, it is necessary to carefully perform the connection work so that the damage does not occur, and workability is poor.
When inserting the PC steel material with the optical fiber attached and the connector at the end thereof into the concrete or the fixing body, a protective cover (see reference numeral 40 in FIGS. 1 and 3C) is attached to the end of the PC steel material. Etc.), but the connector can move freely with respect to the PC steel in the protective cover (see FIG. 3B). For this reason, during insertion work, there is a possibility that the optical fiber moves and breaks along with the movement of the connector, or contacts with the terminal of the PC steel material to be damaged.

本発明は、以上の実状の下、光ファイバ及びコネクタのＰＣ鋼材の端末への取付強度（固定強度）を向上させることを課題とする。   This invention makes it a subject to improve the attachment strength (fixing strength) to the terminal of the PC steel material of an optical fiber and a connector under the above actual condition.

上記課題を達成するため、本発明は、光ファイバをＰＣ鋼材の全長に亘って設けたＰＣ鋼材の端末処理構造であって、前記光ファイバの端末に取り付けたコネクタと、そのコネクタを支持固定する柱状ケースとを有し、そのケースは上記ＰＣ鋼材に一端で同一軸上に嵌め込み固定されている構成としたのである。   In order to achieve the above object, the present invention is a PC steel material terminal processing structure in which an optical fiber is provided over the entire length of a PC steel material, and a connector attached to the end of the optical fiber, and the connector is supported and fixed. The case has a columnar case, and the case is configured to be fitted and fixed on the same axis at one end to the PC steel material.

本発明は、以上のように構成し、コネクタをケースで支持固定し、そのケースの一端をＰＣ鋼材に固定したので、ＰＣ鋼材に対しコネクタ及びそのコネクタから導出された光ファイバの端末が自由に動くことが無くなり、ＰＣ鋼材への取付強度が向上する。このため、コネクタと光ファイバを配置したＰＣ鋼材をコンクリートや定着体に挿通する際、そのコネクタやコネクタから導出された光ファイバがＰＣ鋼材に対して不用意に動かないため、光ファイバが折れたり、ＰＣ鋼材の端部に接触したりして損傷する恐れは少なくなり、この挿通作業も容易となる。   Since the present invention is configured as described above, the connector is supported and fixed by the case, and one end of the case is fixed to the PC steel material, the connector and the end of the optical fiber led out from the connector are free to the PC steel material. It will not move and the mounting strength to PC steel will be improved. For this reason, when a PC steel material in which a connector and an optical fiber are arranged is inserted into concrete or a fixing body, the optical fiber derived from the connector or the connector does not move carelessly with respect to the PC steel material. The risk of damage due to contact with the end of the PC steel material is reduced, and this insertion work is also facilitated.

本発明の一態様に係る光ファイバを備えたＰＣ鋼より線の端末処理構造の端末部の斜視図である。It is a perspective view of the terminal part of the terminal treatment structure of the PC steel strand provided with the optical fiber which concerns on 1 aspect of this invention. 同端末部の部分切断正面図である。It is a partial cutting front view of the terminal part. 同端末部の作用説明図である。It is operation | movement explanatory drawing of the terminal part. 同端末部の作用説明図である。It is operation | movement explanatory drawing of the terminal part. 同端末部の作用説明図である。It is operation | movement explanatory drawing of the terminal part. 同端末処理構造をなすコネクタ支持用ケースの斜視図である。It is a perspective view of the case for connector support which makes the terminal processing structure. 同ケースを示し、（ａ）は平面図、（ｂ）は一部切断正面図、（ｃ）は左側面図、（ｄ）は右側面図である。The same case is shown, (a) is a plan view, (b) is a partially cut front view, (c) is a left side view, and (d) is a right side view. 同光ファイバを備えたＰＣ鋼より線の他例の断面図である。It is sectional drawing of the other example of PC steel strand provided with the same optical fiber. 本発明の他の各態様に係る光ファイバを備えたＰＣ鋼材の端末処理構造の端末部の斜視図である。It is a perspective view of the terminal part of the terminal processing structure of PC steel materials provided with the optical fiber concerning other each mode of the present invention.

（本発明の実施形態の説明）
本発明に係る光ファイバを備えたＰＣ鋼より線の端末処理構造の実施形態としては、光ファイバをＰＣ鋼材の全長に亘って設けたＰＣ鋼材の端末処理構造であって、前記光ファイバの端末に取り付けたコネクタと、そのコネクタを支持固定する柱状ケースとを有し、そのケースは上記ＰＣ鋼材に一端で同一軸上に嵌め込み固定されている構成を採用することができる。
上記ＰＣ鋼材は、ＰＣ鋼線、ＰＣ鋼棒およびＰＣ鋼より線等が考えられる。また、そのＰＣ鋼より線は、７本撚り、１９本撚り等の従来周知のものを採用し得る。さらに、光ファイバの構成も、ＰＣ鋼材の全長に亘って設けてその歪み（張力）を測定し得るものであれば、何れでも良い。また、ＰＣ鋼材における光ファイバの配置もそのＰＣ鋼材表面だけでなく、ＰＣ鋼より線の場合、その撚り線（ストランド）を構成する素線間等に配置することができる。コネクタも従来周知の物を採用することができる。 (Description of Embodiment of the Present Invention)
An embodiment of a PC steel strand end treatment structure provided with an optical fiber according to the present invention is a PC steel end treatment structure in which an optical fiber is provided over the entire length of the PC steel, and the end of the optical fiber. And a columnar case for supporting and fixing the connector, and the case can be configured such that the case is fitted and fixed on the same axis at one end to the PC steel material.
The PC steel material may be a PC steel wire, a PC steel rod, a PC steel wire, or the like. Further, as the PC steel strand, conventionally known ones such as 7 strands and 19 strands can be adopted. Furthermore, the configuration of the optical fiber may be any as long as it is provided over the entire length of the PC steel material and the strain (tension) can be measured. Moreover, the arrangement of the optical fiber in the PC steel material can be arranged not only on the surface of the PC steel material but also between strands constituting the stranded wire (strand) in the case of the PC steel strand. A conventionally well-known thing can be employ | adopted for a connector.

上記コネクタを支持固定する柱状ケースの上記ＰＣ鋼材への固定は、そのＰＣ鋼材端末外周面にケース一端を嵌め込む手段を採用することができるが、ＰＣ鋼材の端末にその径よりも小径の突起物を形成し、その突起物にケースを嵌め込む手段を採用することもできる。その突起物は、ＰＣ鋼材と同一軸心であると、ＰＣ鋼材とケースを同一軸心にし易い。
上記ＰＣ鋼材がＰＣ鋼より線からなる場合は、そのＰＣ鋼より線の１本の素線が他の素線より突出し、前記ＰＣ鋼より線のらせん溝に沿って上記光ファイバが接着固定されており、前記突出素線に前記ケースの一端が嵌め込まれている構成を採用することができる（図１等参照）。この場合、その突出素線が中心線（心線）とすれば、上記と同様に、ＰＣ鋼材とケースを同一軸心にし易い。 For fixing the columnar case for supporting and fixing the connector to the PC steel material, means for fitting one end of the case to the outer peripheral surface of the PC steel material terminal can be adopted. It is also possible to adopt means for forming an object and fitting the case into the protrusion. If the protrusion has the same axis as that of the PC steel material, the PC steel material and the case can easily have the same axis.
When the PC steel material is made of PC steel wire, one strand of the PC steel wire protrudes from the other strand, and the optical fiber is bonded and fixed along the spiral groove of the PC steel wire. It is possible to adopt a configuration in which one end of the case is fitted into the protruding element wire (see FIG. 1 and the like). In this case, if the protruding element wire is a center line (core wire), the PC steel material and the case can be easily set on the same axis as described above.

上記コネクタ支持用ケースは、その一端がＰＣ鋼材端末（突起物、突出素線）に嵌り得て、コネクタのブーツを支持し得る形状の物であれば何れも採用し得るが、例えば、柱状本体に形成された軸方向の溝と、前記本体の端面に形成された上記ＰＣ端末又は突出素線が嵌る凹部を有し、前記溝は、コネクタのブーツが嵌る部分と、そのブーツから突出する光ファイバ端末が嵌る部分を有する構成とし得る。
このようにすれば、ケースが柱状であることから、その一端をＰＣ鋼材又は突出素線に嵌めれば、ＰＣ鋼材とケースが同一軸上に容易に一体とすることができ、その一体化したケースの溝にコネクタのブーツ及び光ファイバが嵌められるため、それらの支持も安定する。 Any of the connector support cases can be adopted as long as one end of the connector support case can fit into a PC steel material terminal (projection, projecting element wire) and can support the boot of the connector. And a recess into which the PC terminal or protruding element wire formed on the end face of the main body is fitted, and the groove has a portion into which a boot of the connector fits and a light projecting from the boot. It can be set as the structure which has a part which a fiber terminal fits.
In this case, since the case has a columnar shape, if one end of the case is fitted to the PC steel material or the protruding element wire, the PC steel material and the case can be easily integrated on the same axis. Since the boot of the connector and the optical fiber are fitted in the groove of the case, their support is also stable.

以上の端末処理構造は種々の方法によって構成すれば良いが、例えば、上記光ファイバの端末をＰＣ鋼材から所要長さ剥ぎ取ってその端末にコネクタを取り付け、上記ケースの一端を前記ＰＣ鋼材端末に嵌め込むとともに、前記剥ぎ取った光ファイバの端末をＰＣ鋼材に沿わせつつ前記コネクタのブーツを前記ケースで支持する構成を採用することができる。
このとき、ＰＣ鋼材がＰＣ鋼より線であれば、そのＰＣ鋼より線の１本の素線を他の素線より突出させ、上記ケースの一端をその突出素線に嵌め込むこととなる。
この構成においても、上記コネクタ支持用ケースは、同様に、柱状本体に形成された軸方向の溝と、前記本体の端面に形成された上記ＰＣ鋼材端末、突起物又は突出素線が嵌る凹部を有し、前記溝は、コネクタのブーツが嵌る部分と、そのブーツから突出する光ファイバ端末が嵌る部分を有しており、前記ケースを前記突出素線等に嵌め込んだ後、そのケースの溝に光ファイバ及びブーツを嵌め込んで支持する構成とすることができる。 The above terminal processing structure may be configured by various methods. For example, the end of the optical fiber is stripped from a PC steel material to a required length, a connector is attached to the terminal, and one end of the case is attached to the PC steel material terminal. It is possible to employ a configuration in which the boot of the connector is supported by the case while fitting the end of the peeled optical fiber along the PC steel material.
At this time, if the PC steel is a strand of PC steel, one strand of the strand of PC steel is projected from the other strand, and one end of the case is fitted into the projected strand.
Also in this configuration, the connector support case similarly has an axial groove formed in the columnar main body and a concave portion into which the PC steel material terminal, protrusion or protruding element wire formed in the end surface of the main body is fitted. The groove has a portion into which the boot of the connector fits and a portion into which the optical fiber terminal protruding from the boot fits, and after the case is fitted into the protruding element wire, the groove in the case An optical fiber and a boot can be fitted in and supported.

（本発明の実施形態の詳細）
本発明に係る光ファイバを備えたＰＣ鋼より線の端末処理構造の具体例を図１及び図２に示し、この実施形態のＰＣ鋼より線Ｐは標準径９．３〜１５．２ｍｍの７本よりであって、そのＰＣ鋼より線Ｐのストランド１０表面のらせん状溝１０ａに光ファイバａが接着固定されている。
その光ファイバａの端末にコネクタ２０が取付られており、そのコネクタ２０は、フェルール２１と、フレーム２２と、プラグフランジ２３と、ブーツ２４等を有し、螺旋状溝を形成した金属製保護管２５を介し光ファイバａが周知の手段によって接続されている（特許文献２参照）。図中、２６はフェルール２１の保護キャップである。 (Details of the embodiment of the present invention)
A concrete example of a PC steel strand end treatment structure provided with an optical fiber according to the present invention is shown in FIGS. 1 and 2, and the PC steel strand P of this embodiment is 7 having a standard diameter of 9.3-15. The optical fiber a is bonded and fixed to the spiral groove 10a on the surface of the strand 10 of the PC steel strand P.
A connector 20 is attached to the end of the optical fiber a. The connector 20 includes a ferrule 21, a frame 22, a plug flange 23, a boot 24, etc., and a metal protective tube having a spiral groove formed therein. The optical fiber a is connected via a well-known means (see Patent Document 2). In the figure, reference numeral 26 denotes a protective cap for the ferrule 21.

そのコネクタ１０及び光ファイバａの接続部はケース（保護カバー）３０内に納められている。そのケース３０は、図４及び図５に示すように、ナイロン系エンジニアリング・プラスチック（ポリアミド）等からなる円柱状本体３１からなり、その本体３１に、軸方向の溝３２と、その端面に横穴状の凹部３３を有している。その溝３２は、コネクタ２０のブーツ２４が嵌る部分３２ａと、そのブーツ２４から突出する光ファイバａの端末（保護管２５）が嵌る部分３２ｂを有する。
その溝３２ａ、３２ｂは、共にその底部が断面円形となって、前者の溝３２ａの底部の内径はブーツ２４の最大外径より０．５ｍｍ程小さくしており、後者の溝３２ｂの底部の内径は保護管２５の最大外径より１ｍｍ程小さくしている。このため、それらの溝３２ａ、３２ｂにブーツ２４及び保護管２５は適当な嵌合力を持って嵌め込まれ、容易に抜けない。 The connector 10 and the connection portion of the optical fiber a are housed in a case (protective cover) 30. As shown in FIGS. 4 and 5, the case 30 is composed of a cylindrical main body 31 made of nylon engineering plastic (polyamide) or the like. The main body 31 has an axial groove 32 and a lateral hole on the end face. The recess 33 is provided. The groove 32 has a portion 32 a into which the boot 24 of the connector 20 fits and a portion 32 b into which the end of the optical fiber a (protective tube 25) protruding from the boot 24 fits.
Both of the grooves 32a and 32b have a circular cross section at the bottom, and the inner diameter of the bottom of the former groove 32a is about 0.5 mm smaller than the maximum outer diameter of the boot 24, and the inner diameter of the bottom of the latter groove 32b. Is smaller than the maximum outer diameter of the protective tube 25 by about 1 mm. For this reason, the boot 24 and the protective tube 25 are fitted in the grooves 32a and 32b with an appropriate fitting force and cannot be easily removed.

この実施形態の光ファイバを備えたＰＣ鋼より線Ｐの端末処理構造は以上の構成であり、その端末処置は、まず、図３Ａに示すように、ＰＣ鋼より線Ｐの端末において、光ファイバａをストランド１０から所要長さ剥ぎ取るとともに、ストランド１０の心線（中心素線）１１を周囲の側線（側素線）１２より突出した態様とする。その態様は、ＰＣ鋼より線Ｐの製造時に形成したり、同図鎖線で示すように、側線１２を切除することによって形成したりする。何れにしても、その心線１１の突出量及び凹部３３の径は、上記ケース３０の凹部３３に嵌ってケース３０が容易に外れないように適宜に設定する。   The terminal treatment structure of the PC steel strand P provided with the optical fiber of this embodiment is the above configuration, and the end treatment is first performed at the end of the PC steel strand P as shown in FIG. While stripping a from the strand 10 for a required length, the core wire (center strand) 11 of the strand 10 is projected from the surrounding side wires (side strands) 12. The aspect is formed at the time of manufacture of the wire P from the PC steel, or is formed by cutting the side wire 12 as shown by a chain line in FIG. In any case, the protruding amount of the core wire 11 and the diameter of the concave portion 33 are appropriately set so that the case 30 is not easily detached by fitting into the concave portion 33 of the case 30.

つぎに、図３Ｂに示すように、光ファイバａにコネクタ２０を取り付けると共に、ストランド１０の心線１１の端部にケース３０を嵌める。続いて、図３Ｃに示すように、前記剥ぎ取った光ファイバａの端末をＰＣ鋼より線Ｐに沿わせつつそのケース３０の溝３２（３２ａ、３２ｂ）に光ファイバａ及びブーツ２４を嵌め込んで、ＰＣ鋼より線Ｐの端部へのケース３０付のコネクタ２０の取付を完了する。この完了状態において、ケース３０を取り付けても、ＰＣ鋼より線Ｐの全長は担保しているものとする。必要に応じて、一端閉塞の金属製保護カバー４０をそのケース３０（コネクタ２０）に嵌める。
これらの作業は、工場において行い、この状態で現場に持ち込んで、コンクリート及び定着体などへの挿入取付けを行う。 Next, as shown in FIG. 3B, the connector 20 is attached to the optical fiber a, and the case 30 is fitted to the end of the core wire 11 of the strand 10. Subsequently, as shown in FIG. 3C, the optical fiber a and the boot 24 are fitted into the groove 32 (32a, 32b) of the case 30 while the end of the stripped optical fiber a is aligned with the PC steel strand P. Then, the attachment of the connector 20 with the case 30 to the end of the wire P from the PC steel is completed. In this completed state, even if the case 30 is attached, it is assumed that the entire length of the wire P is secured from the PC steel. If necessary, a metal protective cover 40 that is closed at one end is fitted into the case 30 (connector 20).
These operations are performed at the factory, brought into the field in this state, and inserted and attached to concrete and a fixing body.

光ファイバａを２本添わせたＰＣ鋼より線Ｐの場合は、溝３２ｂに相当するもう一つの嵌合溝を上記ケース３０の先端まで延伸して形成し、その嵌合溝を介して他の光ファイバａをその先端まで引き出してさらに前記ケース３０と同様のケースに導くとともにブーツ２４、コネクタ２０を取付けてそのケースに嵌め込み、その直列配置された二つのケースにその両ケースを収納できる長さの金属製保護カバー４０を嵌める。光ファイバａを３本以上添わせたＰＣ鋼より線Ｐの場合でも同様とする。
なお，この実施形態の光ファイバａを備えたＰＣ鋼より線Ｐの端末処理構造は、金属製保護カバー４０に格納された状態でその最大径がＰＣ鋼より線Ｐの外径＋２．４ｍｍ以内であり、緊張用ジャッキや定着体に挿通できる大きさである。 In the case of a PC steel strand P with two optical fibers a attached, another fitting groove corresponding to the groove 32b is formed to extend to the tip of the case 30, and the other is passed through the fitting groove. The optical fiber a is drawn out to its tip and guided to the same case as the case 30 and the boot 24 and the connector 20 are attached and fitted into the case, and both cases can be stored in the two cases arranged in series. The metal protective cover 40 is fitted. The same applies to the case of a strand P made of PC steel to which three or more optical fibers a are attached.
In addition, the terminal treatment structure of the PC steel strand P provided with the optical fiber a of this embodiment has a maximum diameter within the outer diameter of the PC steel strand P + 2.4 mm when stored in the metal protective cover 40. It is a size that can be inserted into a tension jack or a fixing body.

上記実施形態において、突出素線は心線１１でなくても側線１２でも良い。この場合は、凹部３３もケース３０の軸心からずらして形成し、その凹部３３に側線１２の端部を嵌めた際、ストランド１０とケース３０が同一軸上になるように形成する。
また、図６に示すように、ストランド１０の全周面をエポキシ樹脂等によって樹脂被覆１３したＰＣ鋼より線Ｐにも採用し得る。 In the above embodiment, the protruding element wire may not be the core wire 11 but the side wire 12. In this case, the concave portion 33 is also formed so as to be shifted from the axial center of the case 30, and the strand 10 and the case 30 are formed on the same axis when the end portion of the side line 12 is fitted into the concave portion 33.
Moreover, as shown in FIG. 6, it can employ | adopt also for the strand P of the PC steel which resin-coated 13 the whole peripheral surface of the strand 10 with the epoxy resin etc.

さらに、ＰＣ鋼より線Ｐの場合、光ファイバａは、その撚り線（ストランド１０）を構成する素線１１、１２間（ストランド１０内）に配置することができる。このとき、光ファイバａは、ストランド１０の撚り工程で素線１１、１２間に介在したり、撚られたストランド１０をその一端から他端に向かって緩解しつつ、その緩解された素線１１、１２間に介在したりすることができ、一方、光ファイバａの端末にコネクタ２０を取り付ける場合は、ＰＣ鋼より線Ｐの端末を緩解して、図３Ａ、図３Ｂに示すように、ストランド１０の素線１１、１２の間から光ファイバａを所要長さ引き出して（剥ぎ取って）その端末にコネクタ２０を取り付ける。   Furthermore, in the case of the PC steel stranded wire P, the optical fiber a can be arranged between the strands 11 and 12 (inside the strand 10) constituting the stranded wire (strand 10). At this time, the optical fiber a is interposed between the strands 11 and 12 in the strand 10 twisting process, or the loosened strand 11 while releasing the twisted strand 10 from one end to the other end. On the other hand, when the connector 20 is attached to the end of the optical fiber a, the end of the PC steel stranded wire P is loosened, and as shown in FIGS. 3A and 3B, the strand The required length of the optical fiber a is pulled out from between the ten strands 11 and 12, and the connector 20 is attached to the terminal.

上記各実施形態のＰＣ鋼材はＰＣ鋼より線Ｐの場合であったが、ＰＣ鋼線、ＰＣ鋼棒の場合であっても、本発明を採用することができる。例えば、図７（ａ）に示すように、ＰＣ鋼線又はＰＣ鋼棒Ｐ１の端末に切削等によって突起物１１ａを形成し、ケース３０をその突起物１１ａに嵌め込んでＰＣ鋼棒Ｐ１等に取り付けたり、同（ｂ）に示すように、ケース３０の一端を筒状にして、その一端をＰＣ鋼棒Ｐ１等の端末に嵌め込んでＰＣ鋼棒Ｐ１等に取り付けたりすることができる。   Although the PC steel material of each said embodiment was the case of the wire P from PC steel, even if it is the case of a PC steel wire and a PC steel rod, this invention is employable. For example, as shown in FIG. 7 (a), a protrusion 11a is formed by cutting or the like on the end of a PC steel wire or PC steel bar P1, and the case 30 is fitted into the protrusion 11a to form a PC steel bar P1 or the like. As shown in FIG. 4B, one end of the case 30 can be formed into a cylindrical shape, and one end of the case 30 can be fitted into a terminal such as a PC steel bar P1 and attached to the PC steel bar P1.

このように、今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。   Thus, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

Ｐ、Ｐ１ ＰＣ鋼材
１０ ＰＣ鋼より線のストランド
１１ 同ストランドの心線（中心素線）
１２ 同側線（側素線）
２０ コネクタ
２１ コネクタのフェルール
２２ 同フレーム
２３ 同プラグフランジ
２４ 同ブーツ
２５ 光ファイバ保護管
２６ フェルール保護キャップ
３０ ケース
３１ 柱状ケース本体
３２ 溝
３２ａ ブーツ嵌合溝
３２ｂ 金属管（光ファイバ）嵌合溝
３３ ストランド素線の嵌合凹部 P, P1 PC steel material 10 PC steel strand 11 Core wire (center wire)
12 Same side line (Side strand)
20 Connector 21 Connector ferrule 22 Same frame 23 Same plug flange 24 Same boot 25 Optical fiber protective tube 26 Ferrule protective cap 30 Case 31 Columnar case body 32 Groove 32a Boot fitting groove 32b Metal tube (optical fiber) fitting groove 33 Strand Wire fitting recess

Claims (7)

光ファイバをＰＣ鋼材の全長に亘って設けたＰＣ鋼材の端末処理構造であって、
上記光ファイバの端末に取り付けたコネクタと、そのコネクタを支持固定する柱状ケースとを有し、そのケースは上記ＰＣ鋼材に一端で同一軸上に嵌め込み固定されているＰＣ鋼材の端末処理構造。 A PC steel end treatment structure in which an optical fiber is provided over the entire length of the PC steel,
A terminal processing structure for PC steel having a connector attached to the end of the optical fiber and a columnar case for supporting and fixing the connector, the case being fitted and fixed on the same axis at one end to the PC steel. 上記ＰＣ鋼材がＰＣ鋼より線からなって、そのＰＣ鋼より線の１本の素線が他の素線より突出し、前記ＰＣ鋼より線のらせん溝に沿って上記光ファイバが接着固定されており、前記突出素線に前記ケースの一端が嵌め込まれている請求項１に記載のＰＣ鋼材の端末処理構造。   The PC steel is made of PC steel wire, one strand of the PC steel strand protrudes from the other strand, and the optical fiber is bonded and fixed along the spiral groove of the PC steel wire. The terminal processing structure for PC steel according to claim 1, wherein one end of the case is fitted into the protruding element wire. 上記突出素線が中心線（心線）である請求項２に記載のＰＣ鋼材の端末処理構造。   The terminal treatment structure for PC steel according to claim 2, wherein the protruding element wire is a center line (core wire). 上記ケースは、柱状本体に形成された軸方向の溝と、前記本体の端面に形成された上記ＰＣ端末又は突出素線が嵌る凹部を有し、前記溝は、コネクタのブーツが嵌る部分と、そのブーツから突出する光ファイバ端末が嵌る部分を有する請求項１〜請求項３のいずれか１項に記載のＰＣ鋼材の端末処理構造。   The case has an axial groove formed in the columnar body, and a recess into which the PC terminal or protruding element wire formed on the end surface of the body fits, and the groove has a portion into which a boot of a connector fits, The terminal processing structure of PC steel materials of any one of Claims 1-3 which have a part in which the optical fiber terminal which protrudes from the boot fits. 請求項４で引用する請求項２又は請求項３に記載のＰＣ鋼材の端末処理構造を構成するためのＰＣ鋼より線の端末処理方法であって、
上記ＰＣ鋼より線の１本の素線を他の素線より突出させるとともに、上記光ファイバの端末をＰＣより線から所要長さ剥ぎ取ってその端末にコネクタを取り付け、上記ケースの一端を前記突出素線に嵌め込むとともに、前記剥ぎ取った光ファイバの端末をＰＣ鋼より線に沿わせつつ前記コネクタのブーツを前記ケースで支持するＰＣ鋼より線の端末処理方法。 A terminal treatment method for PC steel strands for constituting the terminal treatment structure for PC steel according to claim 2 or claim 3 cited in claim 4,
One strand of the PC steel strand is protruded from the other strand, the end of the optical fiber is stripped from the PC strand to a required length, and a connector is attached to the end, and one end of the case is attached to the end of the case. A PC steel strand end treatment method in which a boot of the connector is supported by the case while being fitted into a protruding strand, and along the stripped optical fiber end along the PC strand. 上記ケースは、柱状本体に形成された軸方向の溝と、前記本体の端面に形成された上記突出素線が嵌る凹部を有し、前記溝は、コネクタのブーツが嵌る部分と、そのブーツから突出する光ファイバ端末が嵌る部分を有しており、上記ケースを前記突出素線に嵌め込んだ後、そのケースの溝に光ファイバ及びブーツを嵌め込んで支持する請求項５に記載の光ファイバを備えたＰＣ鋼より線の端末処理方法。   The case has an axial groove formed in the columnar main body, and a recess into which the protruding element wire formed on the end surface of the main body is fitted, and the groove includes a portion into which the boot of the connector is fitted, and the boot. 6. The optical fiber according to claim 5, further comprising a portion into which a projecting optical fiber terminal is fitted, and after the case is fitted into the projecting element wire, an optical fiber and a boot are fitted into the groove of the case and supported. PC steel stranded end treatment method comprising: 請求項４記載のＰＣ鋼線の端末処理構造又は請求項６記載のＰＣ鋼より線の端末処理方法に使用するケースであって、柱状本体と、その本体に形成された軸方向の溝と、前記本体の端面に形成された上記突出素線が嵌る凹部を有し、前記溝は、コネクタのブーツが嵌る部分と、そのブーツから突出する光ファイバ端末が嵌る部分を有するコネクタ支持用ケース。   It is a case used for the terminal treatment structure of the PC steel wire according to claim 4 or the terminal treatment method of the PC steel strand according to claim 6, wherein the columnar main body, the axial groove formed in the main body, A connector supporting case having a recess into which the protruding element wire formed on the end face of the main body is fitted, and wherein the groove has a portion into which a boot of the connector is fitted and a portion into which an optical fiber terminal protruding from the boot is fitted.
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