JPH07261062A - Pipe for coating optical fiber and its production - Google Patents

Pipe for coating optical fiber and its production

Info

Publication number
JPH07261062A
JPH07261062A JP6089068A JP8906894A JPH07261062A JP H07261062 A JPH07261062 A JP H07261062A JP 6089068 A JP6089068 A JP 6089068A JP 8906894 A JP8906894 A JP 8906894A JP H07261062 A JPH07261062 A JP H07261062A
Authority
JP
Japan
Prior art keywords
pipe
optical fiber
layer
flexibility
grooves
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.)
Pending
Application number
JP6089068A
Other languages
Japanese (ja)
Inventor
Katsuo Midorikawa
克夫 翠川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyopolymer Co Ltd
Original Assignee
Toyopolymer Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyopolymer Co Ltd filed Critical Toyopolymer Co Ltd
Priority to JP6089068A priority Critical patent/JPH07261062A/en
Publication of JPH07261062A publication Critical patent/JPH07261062A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/443—Protective covering
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4479—Manufacturing methods of optical cables
    • G02B6/4486—Protective covering

Abstract

PURPOSE:To obtain a pipe for coating optical fiber which permits mass production, is formable to have a long one span and has high flexibility and pressure resistant strength by cutting independent parallel grooves into a spiral or toric shape on the circumference of an extrusion molded pipe. CONSTITUTION:This pipe for coating optical fiber is formed by cutting the parallel grooves 9 of the spiral or annular shape on the surface of an extruded synthetic resin pipe 8 of a single layer consisting of a medium-hardness resin or of double layers consisting of an outer hard layer 8a and inner soft layer 8b to impact the flexibility and the pressure resistant strength thereto and this process is for producing such pipe. Since the pipe has the grooves 9, the flexibility is imparted to the pipe so that the pipe withstand bending of the optical fiber. The residual parts X of the surface remaining between the grooves 9 resist the pressing from outside. Particularly the extruded synthetic resin pipe 8 of the double layers is capable of sufficiently maintaining the pressure resistant strength and the flexibility. Since the inside wall surface is circular free from ruggedness, the optical fiber is insertable in the long one span at one time into the coating pipe.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】光ファイバー被覆パイプおよびそ
の製造方法。[Industrial application] Optical fiber coated pipe and its manufacturing method.

【０００２】[0002]

【従来技術とその問題点】従来の光ファイバー被覆パイ
プは図１０に示すように、その耐圧強度を増すため被覆
パイプ１０１のプラスチックまたはゴムの内部に鋼線な
どを埋設していたが、このため内壁面に凹凸１０３が生
じる。したがって光ファイバーを挿通するときこの凹凸
１０３が邪魔になり、長いスパンの光ファイバーを挿通
することができず、ワンスパンの長さが短いものとなる
難点があった。さらに大量生産できない。2. Description of the Related Art As shown in FIG. 10, a conventional optical fiber coated pipe has a steel wire or the like embedded in the plastic or rubber of the coated pipe 101 in order to increase its pressure resistance. Unevenness 103 occurs on the wall surface. Therefore, when the optical fiber is inserted, the unevenness 103 becomes an obstacle, and it is not possible to insert the optical fiber having a long span, resulting in a short one span. Further mass production is not possible.

【０００３】[0003]

【解決すべき課題】大量生産ができ、かつ、ワンスパン
が長くでき、さらにフレキシビリティと耐圧強度の大き
い大きい光ファイバー被覆パイプを得ること。[PROBLEMS TO BE SOLVED] To obtain a large-sized optical fiber coated pipe which can be mass-produced, can be extended in one span, and has high flexibility and pressure resistance.

【０００４】[0004]

【技術的手段】中硬質の樹脂からなる単層、あるいは、
外側硬質層８ａ、内側軟質層８ｂからなる複層合成樹脂
押出パイプの表面に、らせん状または円環状の平行した
溝５，７，８，１０を切ってフレキシビリティと耐圧強
度を付与した光ファイバー被覆パイプおよびその製造方
法。[Technical Means] A single layer made of medium-hard resin, or
Optical fiber coating with flexibility and pressure resistance by cutting spiral or annular parallel grooves 5, 7, 8 and 10 on the surface of a multi-layer synthetic resin extruded pipe consisting of an outer hard layer 8a and an inner soft layer 8b. Pipe and its manufacturing method.

【０００５】[0005]

【作用】溝５，７，９，１０が切ってあるので、フレキ
シビリティが付与され、光ファイバーの屈曲に耐えると
ともに、外部からの押圧に対しては、溝の間に残された
表面残部ｘが対抗する。特に複層合成樹脂押出パイプ８
は耐圧強度とフレキシビリティが充分に保持できる。Since the grooves 5, 7, 9 and 10 are cut, flexibility is imparted, the optical fiber can withstand bending, and the surface residue x left between the grooves against external pressure. Oppose. Especially multi-layer synthetic resin extrusion pipe 8
Has sufficient pressure resistance and flexibility.

【０００６】また内壁面は凹凸面の無い円形であるの
で、光ファイバーは長いワンスパンを一度に被覆パイプ
に通すことができる。Further, since the inner wall surface has a circular shape with no uneven surface, the optical fiber can pass a long one span through the coated pipe at a time.

【０００７】[0007]

【実施例】第１実施例は図１〜７に示すように、ナイロ
ンまたはジュラコン樹脂で、中硬質の樹脂を用いた単層
パイプを押出成型した場合である。Example 1 In Example 1, as shown in FIGS. 1 to 7, a single-layer pipe made of nylon or Duracon resin and medium-hard resin was extrusion-molded.

【０００８】図１のように押出機１から押出された単層
パイプ３は冷却区間２で冷却された後、平行した円環状
の溝５が４により切られる。その溝５を切る順序は図
３、図４に示してある。As shown in FIG. 1, the single-layer pipe 3 extruded from the extruder 1 is cooled in the cooling section 2 and then the parallel annular grooves 5 are cut by 4. The order of cutting the groove 5 is shown in FIGS.

【０００９】図３ａ、４ａに示すように、刃４は冷却区
間２の下流側に待機している。そして図３ｂ、図４ｂの
ように溝５の深さだけ単層パイプ３に食い込み、そのま
ま図３ｃ，図４ｃのように１８０°回転し、さらに、図
３ｄ、図ｄのように３６０°回転しながら単層パイプ３
と同行し、１本の円環状の溝５の切り込みを終了する。
そして図３ｅ，４ｅのように単層パイプ３から離脱した
後、図３ａ、図４ａの位置に戻る。As shown in FIGS. 3 a and 4 a, the blade 4 stands by on the downstream side of the cooling section 2. Then, as shown in FIGS. 3b and 4b, the bite 5 penetrates into the single-layer pipe 3 and rotates 180 ° as shown in FIGS. 3c and 4c, and further 360 ° as shown in FIGS. 3d and d. While single layer pipe 3
And the cutting of one annular groove 5 is completed.
Then, after being separated from the single-layer pipe 3 as shown in FIGS. 3e and 4e, it returns to the positions shown in FIGS. 3a and 4a.

【００１０】溝５の深さは、単層パイプ３の厚さの１／
２位が普通であるが、要するに単層パイプ３のフレキシ
ビリティと耐圧強度を保持できればよい。単層パイプの
内壁面は凹凸を有しない円形である。ｘは溝５の間に残
された表面残部である。The depth of the groove 5 is 1 / thick of the thickness of the single-layer pipe 3.
Second place is common, but in short, it is sufficient if the flexibility and pressure resistance of the single-layer pipe 3 can be maintained. The inner wall surface of the single-layer pipe has a circular shape without unevenness. x is the surface remainder left between the grooves 5.

【００１１】つぎに、図６、図７に示すらせん状の円溝
７を切り込む場合について説明する。刃６は冷却区間２
の下流側に待機しており、図６ａ、図７ａのようにま
づ、溝７の深さだけ単層パイプ３に食い込む。そしてそ
のままの水平位置で、図６ｂ、図７ｂのように１８０゜
回転する。すると単層パイプ３はその間に前進するので
らせん状の１／２ピッチが形成される。Next, the case of cutting the spiral circular groove 7 shown in FIGS. 6 and 7 will be described. Blade 6 is cooling section 2
It stands by on the downstream side, and as shown in FIGS. 6a and 7a, it digs into the single-layer pipe 3 by the depth of the groove 7. Then, in the horizontal position as it is, rotate 180 ° as shown in FIGS. 6b and 7b. Then, since the single-layer pipe 3 advances in the meantime, a spiral 1/2 pitch is formed.

【００１２】そして、図６ｃ，図７ｃのように単層パイ
プ３の前進と、刃６の３６０゜の回転によりわワンピッ
チのらせんが切られる。以下同様にらせん状の溝７が切
られてゆく。ｘは溝７の間に残存する表面残部である。Then, as shown in FIGS. 6c and 7c, the single-layer pipe 3 is advanced and the blade 6 is rotated by 360 ° to cut the one-pitch spiral. Similarly, the spiral groove 7 is cut thereafter. x is the remaining surface remaining between the grooves 7.

【００１３】（第２実施例）第２実施例は外側硬質層８
ａ、内側軟質層８ｂとからなる複層押出パイプ８に円環
状平行溝９、らせん状の溝１０を切ったものである。(Second Embodiment) The second embodiment is the outer hard layer 8
The multi-layer extruded pipe 8 composed of a and the inner soft layer 8b is cut with the annular parallel grooves 9 and the spiral groove 10.

【００１４】例えば複層パイプは硬質塩化ビニールと軟
質塩化ビニール、硬質ポリエチレンと軟質ポリエチレン
の組み合わせが考えられる。その溝の切り方は第１実施
例と同様である。その深さは外側硬質層８ａの厚さの全
部ないし半分である。第２実施例は第１実施例に比べ、
フレキシビリティと耐圧強度が充分にとれる利点があ
る。For example, the multi-layer pipe may be a combination of hard vinyl chloride and soft vinyl chloride, and hard polyethylene and soft polyethylene. How to cut the groove is the same as in the first embodiment. Its depth is all or half of the thickness of the outer hard layer 8a. The second embodiment is different from the first embodiment in
There is an advantage that flexibility and pressure resistance can be sufficiently obtained.

【００１５】[0015]

【発明の効果】▲ａ▼ 溝５，７，９，１０が切ってあ
るので、フレキシビリティが付与され、光ファイバーの
屈曲に耐えるとともに、外部からの押圧に対しては、溝
の間に残された表面残部が対抗する。特に複層合成樹脂
押出パイプ８は耐圧強度とフレキシビリティが充分に保
持できる。EFFECTS OF THE INVENTION (a) Since the grooves 5, 7, 9 and 10 are cut, flexibility is imparted, the optical fiber can withstand bending, and it is left between the grooves when pressed from the outside. The rest of the surface opposes. In particular, the multilayer synthetic resin extruded pipe 8 can sufficiently maintain the pressure resistance and flexibility.

【００１６】▲ｂ▼ また内壁面は凹凸面の無い円形で
あるので、長いワンスパンの光ファイバーを被覆パイプ
に通すことができる。(B) Since the inner wall surface has a circular shape with no uneven surface, a long one-span optical fiber can be passed through the coated pipe.

【００１７】▲ｃ▼ 押出成型後冷却して溝を切る工程
により大量生産が可能である。(C) Mass production is possible by a step of cooling after extrusion and cutting grooves.

【図面の簡単な説明】[Brief description of drawings]

【図１】 本発明パイプの製造装置のフローシート、FIG. 1 is a flow sheet of a pipe manufacturing apparatus of the present invention,

【図２】 単層パイプ３に円環状の溝５を切ったときの
斜視図、FIG. 2 is a perspective view of the single-layer pipe 3 in which an annular groove 5 is cut,

【図３】ａ．単層パイプ３に円環状の溝５を切るときの
刃４の待機中の工程を正面図で示す。 ｂ．同じく刃４が単層パイプ３に切り込んだ時点、 ｃ．同じく刃４が１８０゜回転した時点を示す。 ｄ．同じく３６０゜回転した時点を示す。 ｅ．同じく刃４が離脱した時点を示す。FIG. 3 a. The front view of the standby process of the blade 4 when cutting the annular groove 5 in the single-layer pipe 3 is shown. b. Similarly, when the blade 4 cuts into the single-layer pipe 3, c. Similarly, the time when the blade 4 is rotated 180 ° is shown. d. Similarly, it shows the time point when it is rotated 360 °. e. Similarly, the time when the blade 4 is removed is shown.

【図４】ａ，ｂ，ｃ，ｄ，ｅ：図４３ ａ，ｂ，ｃ，
ｄ，ｅの状態を側面図で示す。FIG. 4 a, b, c, d, e: FIG. 43 a, b, c,
The state of d and e is shown by a side view.

【図５】 単層パイプ３にらせん状の溝７を切ったとき
の斜視図、FIG. 5 is a perspective view when the spiral groove 7 is cut in the single-layer pipe 3,

【図６】ａ．単層パイプ３にらせん状の溝７を切るとき
刃６が単層パイプ３に切り込んだ時点を正面図で示す。 ｂ．同じく１／２ッチ単層パイプ３が前進した時点を示
す。 ｃ．同じく１ピッチ単層パイプ３が前進した時点を示
す。FIG. 6 a. When cutting the spiral groove 7 in the single-layer pipe 3, the blade 6 cuts the single-layer pipe 3 in a front view. b. Similarly, it shows the time when the 1 / 2-inch single-layer pipe 3 advances. c. Similarly, the time when the 1-pitch single-layer pipe 3 advances is shown.

【図７】ａ，ｂ，ｃ：図６ ａ，ｂ，ｃの状態を側面図
で示す。FIG. 7 a, b, c: side views showing the states of FIG. 6 a, b, c.

【図８】 複層パイプ８に円環状の溝９を切ったときの
斜視図、FIG. 8 is a perspective view of the multi-layer pipe 8 in which an annular groove 9 is cut,

【図９】 同じくらせん状の溝１０を切った場合の斜視
図、FIG. 9 is a perspective view when the same spiral groove 10 is cut,

【図１０】 従来の光ファイバー被覆パイプの断面図、FIG. 10 is a sectional view of a conventional optical fiber coated pipe,

【符号の説明】[Explanation of symbols]

１：押出成型機、２：冷却区間、３：単層パイプ、４：
円環状の溝３を切る刃、５：円環状の溝、６：らせん状
の溝７を切る刃、７：らせん状の溝、８：複層パイプ、
８ａ：外側硬質層、８ｂ：内側軟質層、９：複層パイプ
の円環状の溝、１０：複層パイプのらせん状の溝、ｘ：
表面残部。1: Extruder, 2: Cooling section, 3: Single layer pipe, 4:
Blade for cutting annular groove 3, 5: annular groove, 6: blade for cutting spiral groove 7, 7: spiral groove, 8: multi-layer pipe,
8a: outer hard layer, 8b: inner soft layer, 9: annular groove of multi-layer pipe, 10: spiral groove of multi-layer pipe, x:
The rest of the surface.

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】 押出成型パイプ３の周囲にらせん形また
は円環状に独立した平行溝５，７，９，１０を切って可
撓管を形成した光ファイバー被覆パイプ。1. An optical fiber coated pipe in which a flexible tube is formed by cutting independent parallel grooves 5, 7, 9, 10 in a spiral shape or an annular shape around an extruded pipe 3. 【請求項２】 押出成型パイプ３が単層の中硬質の合成
樹脂からなる請求項１記載の光ファイバー被覆パイプ。2. The optical fiber coated pipe according to claim 1, wherein the extruded pipe 3 is made of a single layer of medium-hard synthetic resin. 【請求項３】 押出成型パイプが外側硬質層８ａ、内側
軟質層８ｂからなり、溝の深さが外側硬質層８ａの厚さ
の全部ないし半分である請求項１記載の光ファイバー被
覆パイプ。3. The optical fiber coated pipe according to claim 1, wherein the extruded pipe comprises an outer hard layer 8a and an inner soft layer 8b, and the depth of the groove is all or half of the thickness of the outer hard layer 8a. 【請求項４】 押出後、冷却した押出成型パイプの周囲
にらせん形または円環状に独立した溝５，７，９，１０
を切りとって可撓管を形成する光ファイバー被覆パイプ
の製造方法。4. After extrusion, spiral or toroidal independent grooves 5, 7, 9, 10 are provided around the cooled extruded pipe.
A method for manufacturing an optical fiber-coated pipe, which is formed by cutting a flexible tube. 【請求項５】 押出成型パイプ３が単層の中硬質の合成
樹脂からなる請求項３記載の製造方法。5. The manufacturing method according to claim 3, wherein the extruded pipe 3 is made of a single layer of medium-hard synthetic resin. 【請求項６】 押出成型パイプが外側硬質層８ａ、内側
軟質層８ｂからなり、溝の深さが外側硬質層８ａの厚さ
の全部ないし半分である請求項３記載の製造方法。6. The method according to claim 3, wherein the extruded pipe comprises an outer hard layer 8a and an inner soft layer 8b, and the depth of the groove is all or half of the thickness of the outer hard layer 8a.
JP6089068A 1994-03-23 1994-03-23 Pipe for coating optical fiber and its production Pending JPH07261062A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6089068A JPH07261062A (en) 1994-03-23 1994-03-23 Pipe for coating optical fiber and its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6089068A JPH07261062A (en) 1994-03-23 1994-03-23 Pipe for coating optical fiber and its production

Publications (1)

Publication Number Publication Date
JPH07261062A true JPH07261062A (en) 1995-10-13

Family

ID=13960545

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6089068A Pending JPH07261062A (en) 1994-03-23 1994-03-23 Pipe for coating optical fiber and its production

Country Status (1)

Country Link
JP (1) JPH07261062A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022252328A1 (en) * 2021-05-31 2022-12-08 南京驭逡通信科技有限公司 Optical fiber coating apparatus and coating method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022252328A1 (en) * 2021-05-31 2022-12-08 南京驭逡通信科技有限公司 Optical fiber coating apparatus and coating method

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