JP2003090941A - Optical fiber drop cable and its manufacturing method - Google Patents
Optical fiber drop cable and its manufacturing methodInfo
- Publication number
- JP2003090941A JP2003090941A JP2001283831A JP2001283831A JP2003090941A JP 2003090941 A JP2003090941 A JP 2003090941A JP 2001283831 A JP2001283831 A JP 2001283831A JP 2001283831 A JP2001283831 A JP 2001283831A JP 2003090941 A JP2003090941 A JP 2003090941A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- length
- cable
- strength member
- tensile strength
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 123
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- LFYJSSARVMHQJB-QIXNEVBVSA-N bakuchiol Chemical compound CC(C)=CCC[C@@](C)(C=C)\C=C\C1=CC=C(O)C=C1 LFYJSSARVMHQJB-QIXNEVBVSA-N 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、光ファイバドロ
ップケーブルおよびその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber drop cable and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】従来、光ファイバドロップケーブルの構
造としては、光ファイバ心線とこの光ファイバ心線を挟
んでその両側に平行に配置された少なくとも一対の第１
抗張力体とがケーブルシースで被覆された光ファイバ部
と、第２抗張力体がシースで被覆されたケーブル支持線
部とが互いに連続的または間欠的に固定されている構造
が知られている。2. Description of the Related Art Conventionally, as a structure of an optical fiber drop cable, an optical fiber core wire and at least a pair of first optical fibers arranged on both sides of the optical fiber core wire in parallel with each other.
There is known a structure in which an optical fiber part in which a strength member is covered with a cable sheath and a cable support wire part in which a second strength member is covered with a sheath are fixed to each other continuously or intermittently.
【０００３】前記光ファイバドロップケーブルにあっ
て、前記第２抗張力体の長さ、光ファイバ心線の長さ、
ケーブル支持線部の長さに線長差がでないように製造さ
れている。In the optical fiber drop cable, the length of the second strength member, the length of the optical fiber core wire,
It is manufactured so that there is no difference in the length of the cable supporting wire portion.
【０００４】[0004]
【発明が解決しようとする課題】フィールドに敷設され
る際、架線張力により支持線（第２抗張力体）が伸び、
光ファイバ部に歪みが生じる。この光ファイバ部に加わ
る歪みが大きくなると、光ファイバ心線の破断確率が高
くなることが知られている。When the cable is laid in the field, the supporting wire (second tensile strength member) is stretched by the overhead wire tension,
Distortion occurs in the optical fiber section. It is known that the greater the strain applied to the optical fiber portion, the higher the probability of breakage of the optical fiber core wire.
【０００５】また、光ファイバドロップケーブルの敷設
時に支持線部を外し敷設する場所がある。この支持線部
を外すことにより、同じ張力が印加された場合の光ファ
イバ部の伸びは大きくなり、敷設作業時に誤って張力を
加え、光ファイバ心線に過大な歪みを与えてしまうこと
が考えられる。また、支持線を外して敷設した部位に外
力が加わり予想外に伸ばされることもある。In addition, there is a place where the supporting wire portion is removed when the optical fiber drop cable is laid. By removing this support wire part, the expansion of the optical fiber part when the same tension is applied increases, and it is possible that the tension is erroneously applied during the laying work, resulting in excessive strain on the optical fiber core wire. To be In addition, external force may be applied to the portion laid by removing the support wire, which may cause unexpected extension.
【０００６】この発明は上述の課題を解決するためにな
されたもので、その目的は、光ファイバ心線にかかる歪
みを小さくすることにより、光ファイバ心線の破断確率
を小さくし、長期間安定した伝送を行うことを可能にし
た光ファイバドロップケーブルおよびその製造方法を提
供することにある。The present invention has been made to solve the above-mentioned problems, and an object thereof is to reduce the strain applied to the optical fiber core, thereby reducing the probability of breakage of the optical fiber core and stabilizing it for a long period of time. It is an object of the present invention to provide an optical fiber drop cable and a manufacturing method thereof capable of performing the above transmission.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に請求項１によるこの発明の光ファイバドロップケーブ
ルは、光ファイバ心線とこの光ファイバ心線を挟んでそ
の両側に平行に配置された少なくとも一対の第１抗張力
体とがケーブルシースで被覆された光ファイバ部と、第
２抗張力体がシースで被覆されたケーブル支持線部とが
互いに連続的または間欠的に固定されてなる光ファイバ
ドロップケーブルであって、前記第２抗張力体の長さを
α、光ファイバ部の長さをβ、ケーブル支持線部を除去
した状況での光ファイバの長さをγとしたとき、γ＞α
＞βであることを特徴とするものである。In order to achieve the above object, an optical fiber drop cable of the present invention according to claim 1 is arranged in parallel on both sides of an optical fiber core wire with the optical fiber core wire being sandwiched therebetween. An optical fiber drop in which at least a pair of first strength members are covered with a cable sheath, and an optical fiber portion in which a second strength member is covered with a sheath are fixed to each other continuously or intermittently. In the case of a cable, γ> α, where α is the length of the second strength member, β is the length of the optical fiber portion, and γ is the length of the optical fiber with the cable supporting wire portion removed.
> Β.
【０００８】したがって、第２抗張力体の長さをα、光
ファイバ部の長さをβ、ケーブル支持線部を除去した状
況での光ファイバの長さをγとしたとき、γ＞α＞βと
することにより、架線時の光ファイバの歪み、ケーブル
支持線部を除去したときの光ファイバの歪みが低減さ
れ、破断確率を下げることが可能となる。Therefore, when the length of the second strength member is α, the length of the optical fiber portion is β, and the length of the optical fiber in the situation where the cable supporting wire portion is removed is γ, γ>α> β By this, the strain of the optical fiber at the time of the overhead wire and the strain of the optical fiber at the time of removing the cable supporting wire portion are reduced, and the breakage probability can be lowered.
【０００９】請求項２によるこの発明の光ファイバドロ
ップケーブルの製造方法は、光ファイバ心線とこの光フ
ァイバ心線を挟んでその両側に平行に配置された少なく
とも一対の第１抗張力体とがケーブルシースで被覆され
た光ファイバ部と、第２抗張力体がシースで被覆された
ケーブル支持線部とが互いに連続的または間欠的に固定
されてなる光ファイバドロップケーブルを製造する際、
光ファイバ心線の送り出し張力を１００としたとき、第
１抗張力体の送り出し張力を２．０倍以上、第２抗張力
体の送り出し張力を４．０倍以上として製造することを
特徴とするものである。According to a second aspect of the present invention, there is provided a method for manufacturing an optical fiber drop cable in which an optical fiber core wire and at least a pair of first tensile strength members arranged in parallel on both sides of the optical fiber core wire are arranged. When manufacturing an optical fiber drop cable in which an optical fiber portion covered with a sheath and a cable supporting wire portion in which the second strength member is covered with the sheath are fixed to each other continuously or intermittently,
When the delivery tension of the optical fiber core wire is 100, the delivery tension of the first strength member is 2.0 times or more, and the delivery tension of the second strength member is 4.0 times or more. is there.
【００１０】したがって、光ファイバ心線の送り出し張
力を１００としたとき、第１抗張力体の送り出し張力を
２．０倍以上、第２抗張力体の送り出し張力を４．０倍
以上として製造することにより、第２抗張力体の長さを
α、光ファイバ部の長さをβ、ケーブル支持線部を除去
した状況での光ファイバの長さをγとしたとき、γ＞α
＞βとなって、架線時の光ファイバの歪み、ケーブル支
持線部を除去したときの光ファイバの歪みが低減され、
破断確率を下げることが可能となる。Therefore, assuming that the feeding tension of the optical fiber core wire is 100, the feeding tension of the first tensile member is 2.0 times or more, and the feeding tension of the second tensile member is 4.0 times or more. , Γ> α, where α is the length of the second strength member, β is the length of the optical fiber portion, and γ is the length of the optical fiber in the situation where the cable supporting wire portion is removed.
> Β, the distortion of the optical fiber at the time of overhead contact and the distortion of the optical fiber when the cable supporting wire is removed are reduced,
The breakage probability can be reduced.
【００１１】[0011]
【発明の実施の形態】以下、この発明の実施の形態につ
いて図面を参照して詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will now be described in detail with reference to the drawings.
【００１２】図２を参照するに、光ファイバドロップケ
ーブル１の構造は、例えば０．２５ｍｍφの光ファイバ
を２本並列に並べた２心光ファイバテープ心線からなる
光ファイバテープ心線３の両脇に例えば０．４ｍｍφの
鋼線からなる第１抗張力体５を配しＰＶＣや難燃性ＰＥ
のような熱可塑性樹脂７で被覆した光ファイバ部９と、
例えば１．２ｍｍφの鋼線からなる第２抗張力体１１を
ＰＶＣや難燃性ＰＥのような熱可塑性樹脂７で被覆した
ケーブル支持線部１３からなっている。これらは平行に
並び、薄い首部１５で連続的または間欠的に固定されて
いる。Referring to FIG. 2, the structure of the optical fiber drop cable 1 is, for example, both of the optical fiber tape core wire 3 which is a two-core optical fiber tape core wire in which two 0.25 mmφ optical fibers are arranged in parallel. A first tensile strength member 5 made of, for example, a 0.4 mmφ steel wire is arranged beside the PVC or flame-retardant PE.
An optical fiber portion 9 coated with a thermoplastic resin 7 such as
For example, it is composed of a cable supporting wire portion 13 in which a second strength member 11 made of a steel wire of 1.2 mmφ is covered with a thermoplastic resin 7 such as PVC or flame-retardant PE. These are arranged in parallel and are fixed continuously or intermittently by the thin neck portion 15.
【００１３】ケーブルを電柱あるいはビル・一般家庭に
引き留める際には、薄い首部１５を利用して光ファイバ
部９と支持線部１３を分離し、その支持線部１３を利用
して引き留められる。When the cable is to be retained on a utility pole or a building / household, the thin neck portion 15 is used to separate the optical fiber portion 9 from the support wire portion 13, and the support wire portion 13 is used to hold the cable.
【００１４】光ファイバ部９の中央にある切り込み部１
７を利用して左右に切り裂き、光ファイバテープ心線３
を取り出し、一方は柱上に設置されたクロージャ内で他
ファイバと接続され、もう一方は屋外あるいは屋内の接
続箱あるいはＯＥ変換器へとつなげられる。Notch 1 in the center of optical fiber 9
Use 7 to cut to the left and right, and the optical fiber tape core wire 3
One is connected to the other fiber in a closure installed on the pillar, and the other is connected to an outdoor or indoor junction box or an OE converter.
【００１５】そして、この光ファイバドロップケーブル
１を製造すると、図１（Ａ）に示した状態となる。そし
て、図１（Ｂ）および図１（Ｃ）に示されているよう
に、第２抗張力体１１の長さをα、光ファイバ部９の長
さをβ、ケーブル支持線部を除去した状況での光ファイ
バ部長さをγとすると、架線時の光ファイバ歪を低減す
るために、支持線の長さαに対して光ファイバ心線の長
さγが長くなるようにする。（α＜γ）
また、支持線を除去した後に生じるファイバ歪を低減す
るために、支持線部を除去した状況でのケーブル部の長
さβにたいして光ファイバ心線の長さγが長くなり（β
＜γ）、かつ支持線を除去した状況では同じ張力が印加
されたときのケーブル伸びが、支持線がついた状態よ
り、大きくなるので、γ−β＞γ−αとなるようにす
る。（α＞β）
よってγ＞α＞βとする事により、架線時にファイバ
歪、支持線部を除去したときのファイバ歪を低減する事
ができ、破断確率を下げることが可能になる。When the optical fiber drop cable 1 is manufactured, the state shown in FIG. 1 (A) is obtained. Then, as shown in FIGS. 1B and 1C, the length of the second strength member 11 is α, the length of the optical fiber portion 9 is β, and the cable support wire portion is removed. If the length of the optical fiber portion is γ, the length γ of the optical fiber core wire is set to be longer than the length α of the support wire in order to reduce the optical fiber strain at the time of the overhead wire. (Α <γ) Further, in order to reduce the fiber strain that occurs after the support wire is removed, the length γ of the optical fiber core wire becomes longer than the length β of the cable portion when the support wire portion is removed ( β
<Γ), and in the situation where the support wire is removed, the cable elongation when the same tension is applied is larger than that with the support wire, so γ-β> γ-α. (Α> β) Therefore, by setting γ>α> β, it is possible to reduce the fiber strain at the time of the overhead wire and the fiber strain when the supporting wire portion is removed, and it is possible to reduce the breakage probability.
【００１６】そして、第２抗張力体１１の送出し張力、
光ファイバ心線３の送出し張力、光ファイバ部９におけ
る第１抗張力体５の送出し張力を制御して試作を行い、
送出し張力と各部の長さの比を調べた。Then, the feeding tension of the second strength member 11,
The delivery tension of the optical fiber core wire 3 and the delivery tension of the first strength member 5 in the optical fiber portion 9 are controlled to perform a trial production,
The ratio of the delivery tension and the length of each part was examined.
【００１７】その結果、光ファイバ心線３の送出し張力
を１００ｇｆに固定し、第２抗張力体１１の送出し張
力、第１抗張力体５の送出し張力を変更して押出しを行
い、第２抗張力体１１の送出し張力による第２抗張力体
１１ー光ファイバ心線３の関係、第１抗張力体５の送出
し張力による第１抗張力体５ー光ファイバ心線３の関係
は、それぞれ図３、図４に示したような結果を得た。As a result, the feeding tension of the optical fiber core wire 3 is fixed at 100 gf, the feeding tension of the second tensile strength member 11 and the feeding tension of the first tensile strength member 5 are changed, and the pushing is performed. The relationship between the second tensile strength member 11 and the optical fiber core wire 3 depending on the feeding tension of the tensile strength member 11 and the relationship between the first tensile strength member 5 and the optical fiber core wire 3 depending on the feeding tension of the first tensile strength member 5 are respectively shown in FIG. The results shown in FIG. 4 were obtained.
【００１８】すなわち、第１抗張力体５の送出し張力
０．６ｋｇｆにおける第２抗張力体１１の送出し張力
と、光ファイバ心線３の長さγが第２抗張力体１１の長
さαに対する長さの比（γ／α）との関係が図３に示さ
れている。また、第２抗張力体１１の送出し張力１．０
ｋｇｆにおける第１抗張力体５の送出し張力と、光ファ
イバ心線３の長さγが第１抗張力体５の長さβに対する
長さの比（γ／β）との関係が図４に示されている。That is, the feeding tension of the second tensile strength member 11 at the feeding tension of the first tensile strength member 5 of 0.6 kgf and the length γ of the optical fiber core wire 3 are longer than the length α of the second tensile strength member 11. The relationship with the height ratio (γ / α) is shown in FIG. In addition, the feeding tension of the second strength member 11 is 1.0
The relationship between the delivery tension of the first strength member 5 in kgf and the ratio of the length γ of the optical fiber core wire 3 to the length β of the first strength member 5 (γ / β) is shown in FIG. Has been done.
【００１９】光ファイバ心線３、第２抗張力体１１、第
１抗張力体５の長さの比は、樹脂の収縮等の影響が大き
く、各部の送出し張力の比だけでは決まらないが、送出
し張力を変更することにより制御可能であることがわか
った。The length ratio of the optical fiber core wire 3, the second tensile strength member 11 and the first tensile strength member 5 is greatly influenced by the shrinkage of the resin and the like, and is not determined only by the ratio of the sending tension of each part, but the sending It was found that control was possible by changing the tension.
【００２０】以上の結果を基にして、次に示すような２
種類の光ファイバドロップケーブル１を試作し、引張試
験時のファイバ歪みを測定した結果、図５、図６に示す
とおりである。Based on the above results, the following 2
The optical fiber drop cables 1 of various types were prototyped and the fiber strains measured during the tensile test were measured. The results are shown in FIGS. 5 and 6.
【００２１】（１）、光ファイバ心線３が第２抗張力体
１１と同程度の長さの光ファイバドロップケーブル（γ
≒α）
（２）、光ファイバ心線３が第２抗張力体１１９ｌ長い
光ファイバドロップケーブル（γ≒１．０００５α）
図５に示されていることから、ケーブル支持線部を除去
した状況での光ファイバ心線３の長さγが第２抗張力体
１１の長さαより長い光ファイバドロップケーブルで
は、歪みが低減されている。(1) An optical fiber drop cable (γ having an optical fiber core wire 3 having a length similar to that of the second tensile strength member 11)
≈α) (2), the optical fiber core wire 3 is the optical fiber drop cable in which the second tensile member 119l is long (γ≈1000.05α) As shown in FIG. 5, the cable support wire portion is removed. The strain is reduced in the optical fiber drop cable in which the length γ of the optical fiber core wire 3 is longer than the length α of the second strength member 11.
【００２２】図６に示されていることから、第２抗張力
体１１を除去した状態では、より低荷重でファイバ伸び
が大きくなるため、光ファイバ心線３の長さγが第２抗
張力体１１を除去した状態の光ファイバ部９の長さβよ
り長い光ファイバドロップケーブルでは、歪みが低減さ
れている。As shown in FIG. 6, in the state in which the second tensile strength member 11 is removed, the fiber elongation increases at a lower load, so that the length γ of the optical fiber core wire 3 is equal to the second tensile strength member 11. The distortion is reduced in the optical fiber drop cable longer than the length β of the optical fiber portion 9 in the state in which is removed.
【００２３】したがって、第２抗張力体の長さをα、光
ファイバ部の長さをβ、ケーブル支持線部を除去した状
況での光ファイバの長さをγとしたとき、γ＞α＞βと
することにより、架線時の光ファイバの歪み、ケーブル
支持線部１３を除去したときの光ファイバの歪みを低減
することができ、破断確率を下げることを可能にするこ
とができる。Therefore, when the length of the second strength member is α, the length of the optical fiber portion is β, and the length of the optical fiber in the situation where the cable supporting wire portion is removed is γ, γ>α> β With the above, it is possible to reduce the strain of the optical fiber at the time of the overhead wire and the strain of the optical fiber when the cable supporting wire portion 13 is removed, and it is possible to reduce the probability of breakage.
【００２４】したがって、光ファイバ心線３の送り出し
張力を１００としたとき、第１抗張力体の送り出し張力
を２．０倍以上、第２抗張力体の送り出し張力を４．０
倍以上として製造することにより、第２抗張力体１１の
長さをα、光ファイバ部９の長さをβ、ケーブル支持線
部１３を除去した状況での光ファイバ３の長さをγとし
たとき、γ＞α＞βとなって、架線時の光ファイバ３の
歪み、ケーブル支持線部１３を除去したときの光ファイ
バの歪みを低減することができ、破断確率を下げること
を可能にすることができる。なお、この発明は前述した
実施の形態に限定されることなく、適宜な変更を行うこ
とによりその他の態様で実施し得るものである。Therefore, when the feeding tension of the optical fiber core wire 3 is 100, the feeding tension of the first tensile strength member is 2.0 times or more, and the feeding tension of the second tensile strength member is 4.0.
The length of the second strength member 11 is α, the length of the optical fiber portion 9 is β, and the length of the optical fiber 3 when the cable supporting wire portion 13 is removed is set to γ by manufacturing as twice or more. At this time, γ>α> β, so that the strain of the optical fiber 3 at the time of overhead contact and the strain of the optical fiber when the cable supporting wire portion 13 is removed can be reduced, and the breakage probability can be reduced. be able to. The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes.
【００２５】[0025]
【発明の効果】以上のごとき発明の実施の形態の説明か
ら理解されるように、請求項１の発明によれば、第２抗
張力体の長さをα、光ファイバ部の長さをβ、ケーブル
支持線部を除去した状況での光ファイバの長さをγとし
たとき、γ＞α＞βとすることにより、架線時の光ファ
イバの歪み、ケーブル支持線部を除去したときの光ファ
イバの歪みを低減することができ、破断確率を下げるこ
とを可能にすることができる。As can be understood from the above description of the embodiment of the invention, according to the invention of claim 1, the length of the second strength member is α, the length of the optical fiber portion is β, When the length of the optical fiber is γ>α> β when the cable supporting line is removed, the optical fiber is distorted during overhead wire and the optical fiber is removed when the cable supporting line is removed. Can be reduced, and the probability of breakage can be reduced.
【００２６】請求項２の発明によれば、光ファイバ心線
の送り出し張力を１００としたとき、第１抗張力体の送
り出し張力を２．０倍以上、第２抗張力体の送り出し張
力を４．０倍以上として製造することにより、第２抗張
力体の長さをα、光ファイバ部の長さをβ、ケーブル支
持線部を除去した状況での光ファイバの長さをγとした
とき、γ＞α＞βとなって、架線時の光ファイバの歪
み、ケーブル支持線部を除去したときの光ファイバの歪
みを低減することができ、破断確率を下げることを可能
にすることができる。According to the second aspect of the present invention, when the feeding tension of the optical fiber core wire is 100, the feeding tension of the first tensile strength member is 2.0 times or more, and the feeding tension of the second tensile strength member is 4.0. When the length of the second strength member is α, the length of the optical fiber portion is β, and the length of the optical fiber without the cable supporting wire portion is γ, γ> When α> β, the strain of the optical fiber at the time of the overhead wire and the strain of the optical fiber when the cable supporting wire portion is removed can be reduced, and the breakage probability can be reduced.
【図１】（Ａ）は、この発明の光ファイバドロップケー
ブルの斜視図、（Ｂ）は、光ファイバ部とケーブル支持
線部との長さ関係を示した斜視図、（Ｃ）は、ケーブル
支持線部と光ファイバ心線との長さ関係を示した斜視図
である。FIG. 1A is a perspective view of an optical fiber drop cable of the present invention, FIG. 1B is a perspective view showing a length relationship between an optical fiber portion and a cable support wire portion, and FIG. 1C is a cable. It is the perspective view which showed the length relationship of a support wire part and an optical fiber core wire.
【図２】この発明の光ファイバドロップケーブルの断面
図である。FIG. 2 is a cross-sectional view of the optical fiber drop cable of the present invention.
【図３】第２抗張力体の送出し張力による第２抗張力体
ー光ファイバ心線の関係を示した図である。FIG. 3 is a diagram showing a relationship between a second strength member and an optical fiber core wire according to a delivery tension of the second strength member.
【図４】第１抗張力体の送出し張力による第１抗張力体
ー光ファイバ心線の関係を示した図である。FIG. 4 is a diagram showing a relationship between a first strength member and an optical fiber core wire according to a delivery tension of the first strength member.
【図５】２種類の光ファイバドロップケーブルを試作
し、第２抗張力体印可荷重に対するファイバ歪みを測定
した図である。FIG. 5 is a diagram in which two types of optical fiber drop cables are prototyped and the fiber strain with respect to the applied load of the second tensile strength body is measured.
【図６】２種類の光ファイバドロップケーブルを試作
し、印可荷重に対するファイバ歪みを測定した図であ
る。FIG. 6 is a diagram in which two types of optical fiber drop cables are prototyped and the fiber strain with respect to the applied load is measured.
１ 光ファイバドロップケーブル
３ 光ファイバ心線
５ 第１抗張力体
７ 熱可塑性樹脂
９ 光ファイバ部
１１ 第２抗張力体
１３ ケーブル支持線部
１５ 首部
１７ 切り込み部
α 第２抗張力体の長さ
β 光ファイバ心線部の長さ
γ ケーブル支持線部を除去した状況での光ファイバの
長さ1 Optical Fiber Drop Cable 3 Optical Fiber Core 5 First Strength Member 7 Thermoplastic Resin 9 Optical Fiber Part 11 Second Strength Member 13 Cable Support Wire Part 15 Neck 17 Notch α Length of Second Strength Member β Optical Fiber Core Line length γ Optical fiber length with the cable support line removed
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮本 末広 千葉県佐倉市六崎1440 株式会社フジクラ 佐倉事業所内 Ｆターム(参考） 2H001 BB15 DD06 DD09 DD22 DD23 DD25 DD32 HH02 KK06 KK17 MM01 PP01 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Suehiro Miyamoto 1440 Rokuzaki, Sakura City, Chiba Prefecture Fujikura Ltd. Sakura office F term (reference) 2H001 BB15 DD06 DD09 DD22 DD23 DD25 DD32 HH02 KK06 KK17 MM01 PP01
Claims (2)
挟んでその両側に平行に配置された少なくとも一対の第
１抗張力体とがケーブルシースで被覆された光ファイバ
部と、第２抗張力体がシースで被覆されたケーブル支持
線部とが互いに連続的または間欠的に固定されてなる光
ファイバドロップケーブルであって、前記第２抗張力体
の長さをα、光ファイバ心線部の長さをβ、ケーブル支
持線部を除去した状況での光ファイバの長さをγとした
とき、γ＞α＞βであることを特徴とする光ファイバド
ロップケーブル。1. An optical fiber part in which an optical fiber core wire and at least a pair of first tensile strength members arranged in parallel on both sides of the optical fiber core wire are covered with a cable sheath, and a second tensile strength member. Is an optical fiber drop cable in which a cable supporting wire portion covered with a sheath is fixed to each other continuously or intermittently, wherein the length of the second strength member is α, and the length of the optical fiber core wire portion is Is the β, and γ is the length of the optical fiber with the cable support wire removed, and γ>α> β.
挟んでその両側に平行に配置された少なくとも一対の第
１抗張力体とがケーブルシースで被覆された光ファイバ
部と、第２抗張力体がシースで被覆されたケーブル支持
線部とが互いに連続的または間欠的に固定されてなる光
ファイバドロップケーブルを製造する際、光ファイバ心
線の送り出し張力を１００としたとき、第１抗張力体の
送り出し張力を２．０倍以上、第２抗張力体の送り出し
張力を４．０倍以上として製造することを特徴とする光
ファイバドロップケーブルの製造方法。2. An optical fiber part in which an optical fiber core wire and at least a pair of first tensile strength members arranged in parallel on both sides of the optical fiber core wire are covered with a cable sheath, and a second tensile strength member. When manufacturing an optical fiber drop cable in which a cable supporting wire portion covered with a sheath is fixed to each other continuously or intermittently, assuming that the sending tension of the optical fiber core wire is 100, A method for producing an optical fiber drop cable, characterized in that the delivery tension is 2.0 times or more, and the delivery tension of the second strength member is 4.0 times or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001283831A JP4727870B2 (en) | 2001-09-18 | 2001-09-18 | Fiber optic drop cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001283831A JP4727870B2 (en) | 2001-09-18 | 2001-09-18 | Fiber optic drop cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003090941A true JP2003090941A (en) | 2003-03-28 |
| JP4727870B2 JP4727870B2 (en) | 2011-07-20 |
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ID=19107271
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001283831A Expired - Fee Related JP4727870B2 (en) | 2001-09-18 | 2001-09-18 | Fiber optic drop cable |
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| JP (1) | JP4727870B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012145759A (en) * | 2011-01-12 | 2012-08-02 | Fujikura Ltd | Optical fiber cable |
| JP2012145758A (en) * | 2011-01-12 | 2012-08-02 | Fujikura Ltd | Optical fiber cable |
| CN104345416A (en) * | 2014-11-04 | 2015-02-11 | 苏州胜信光电科技有限公司 | Reinforced dishing optical cable |
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| CN104345416A (en) * | 2014-11-04 | 2015-02-11 | 苏州胜信光电科技有限公司 | Reinforced dishing optical cable |
| CN104345416B (en) * | 2014-11-04 | 2017-02-15 | 苏州胜信光电科技有限公司 | Reinforced dishing optical cable |
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|---|---|
| JP4727870B2 (en) | 2011-07-20 |
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