JPS60108813A - Optical fiber cable - Google Patents
Optical fiber cableInfo
- Publication number
- JPS60108813A JPS60108813A JP58218094A JP21809483A JPS60108813A JP S60108813 A JPS60108813 A JP S60108813A JP 58218094 A JP58218094 A JP 58218094A JP 21809483 A JP21809483 A JP 21809483A JP S60108813 A JPS60108813 A JP S60108813A
- Authority
- JP
- Japan
- Prior art keywords
- pipes
- optical fiber
- outside
- tube
- curvature
- 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 32
- 239000000835 fiber Substances 0.000 abstract description 7
- 239000004033 plastic Substances 0.000 abstract description 4
- 229920003023 plastic Polymers 0.000 abstract description 4
- 238000005452 bending Methods 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
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
- G02B6/4439—Auxiliary devices
- G02B6/4459—Ducts; Conduits; Hollow tubes for air blown fibres
- G02B6/4461—Articulated
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Insulated Conductors (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はレーザー加工機やレーザーメス等に用いられる
光フアイバーケープlしに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an optical fiber cape used in laser processing machines, laser scalpels, and the like.
従来例の構成とその問題点
従来、光ファイバーを保護する目的で、光ファイバーに
プラスチック被覆が施こされている。光通信用の光フア
イバーケーブルのように、ファイバーが十分細く、例え
ば数10μm程度の線径であれば半径数p程度の曲げに
耐えることができる。Conventional Structure and Problems Conventionally, optical fibers have been coated with plastic in order to protect them. If the fiber is sufficiently thin, such as an optical fiber cable for optical communication, and has a wire diameter of, for example, several tens of micrometers, it can withstand bending with a radius of several points.
ところが、レーザー加工機などの光パワー伝送用光ファ
イバー等においては、光フアイバー線径はQ、5M〜2
u程度が必要とされる。この場合、時には半径数1oO
wLの曲げによって光ファインく−が折損する場合があ
る。このように、線径の大きな光ファイバーに対しては
プラスチックの被覆では光ファイバーの保護は十分では
ない。数100悲の破断曲率以下には極めて曲がりにく
い高い剛性が必要である。それと同時に破断曲率に至る
までは柔軟に曲がることも必要である。However, in optical fibers for optical power transmission such as laser processing machines, the diameter of the optical fiber is Q, 5M to 2
About u is required. In this case, sometimes the radius is several oO
The optical fiber may break due to bending of wL. As described above, plastic coating is not sufficient to protect optical fibers with large diameters. A high rigidity that is extremely difficult to bend is required for a fracture curvature of several hundred tens of meters or less. At the same time, it is also necessary to bend flexibly until the fracture curvature is reached.
発明の目的
本発明は上記の点に鑑み、破断曲率に至るまでは柔軟に
曲がり、破断曲率以下には極めて曲がりに<<、高い剛
性を有する光ファイバーケーブルを提供することを目的
とするものである。Purpose of the Invention In view of the above points, it is an object of the present invention to provide an optical fiber cable that bends flexibly up to the breaking curvature, bends extremely easily below the breaking curvature, and has high rigidity. .
発明の構成
本発明は光ファイバーを挿通したチューブの外側に短か
く切った複数の内側パイプを密接して通し、この内側パ
イプ同士の隣接部を覆うように、複数の外側パイプを連
設し、これらが長手方向にずれないようにケーブル端部
で固定したもので、内側パイプと外側パイプが当シ合っ
て、一定曲率以下には曲がらないようにしたものである
。Structure of the Invention The present invention involves passing a plurality of short inner pipes closely to the outside of a tube into which an optical fiber is inserted, and connecting a plurality of outer pipes so as to cover adjacent parts of the inner pipes. The cable is fixed at the end of the cable to prevent it from shifting in the longitudinal direction, and the inner and outer pipes touch each other to prevent them from bending below a certain curvature.
実施例の説明
以下本発明の一実施例について図面を参照して説明する
。第1図は本発明による光フアイバーケーブルの端部近
傍の長手方向断面図である。1は光ファイバーのコアで
、2はヌテンレ7チューブのル−ヌクフッドであシ、こ
れらにょシ光ファイバーを構成している。これはもちろ
んプラスチックコートされたファイバーでも良い。光フ
ァイバーはプラスチック、ゴム等の柔軟なチューブ3に
内装されており、チューブ3の外側には複数の内側パイ
プ4&、4b、40. 4d・・・・・・が密接して嵌
装されている。これら内側パイプ4a、4b。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of the vicinity of the end of the optical fiber cable according to the present invention. 1 is the core of the optical fiber, and 2 is the loop hood of 7 tubes, which constitute the optical fiber. Of course, this may also be a plastic-coated fiber. The optical fiber is housed in a flexible tube 3 made of plastic, rubber, etc., and on the outside of the tube 3 there are a plurality of inner pipes 4 &, 4b, 40 . 4d... are fitted closely together. These inner pipes 4a, 4b.
40、 ・・・・・・の隣接部を覆うように、内側パイ
プ4J 4b、40・・・・・・の外径よ)やや大きい
内径をもつ外側パイプ5!L、esb、6c・・・・・
が密接して遊嵌されている。6はファイバーを固定する
スリーブで、ファイバー及び内側パイプ4aに接着され
ている。スリーブ6は必ずしも必要なく、直接ファイバ
ーをチューブ3に接着しても良い。7はパイプの間にゴ
ミが何着するのを防ぐビニールの外被である。The outer pipe 5 has a slightly larger inner diameter (than the outer diameter of the inner pipe 4J 4b, 40...) so as to cover the adjacent part of 40,...! L, esb, 6c...
are fitted closely and loosely. Reference numeral 6 denotes a sleeve for fixing the fiber, which is bonded to the fiber and the inner pipe 4a. The sleeve 6 is not necessarily required, and the fiber may be directly bonded to the tube 3. 7 is a vinyl jacket that prevents dirt from getting stuck between the pipes.
第2図はチューブ3の端部における内側パイプ4a、外
側パイプδ&の係止状態を示す斜視図である。内側パイ
プ4&に形成された爪4xがチューブ3にくい込み、内
側パイプ4aとチューブ3を係止しておシ、内側パイプ
4aに形成された小孔4yに、外側バイブロaに形成さ
れた爪6Xが折り曲げられて挿入されており、これらに
よりチューブ3、内側パイプ42L、外側パイプ52L
は互いに係止されている。チ1エーブ3の他端部も同様
に係止されておシ、このことによシチューブ3、内側パ
イプ4i1L、4b、40・・・・・・、外側5a。FIG. 2 is a perspective view showing the locked state of the inner pipe 4a and the outer pipe δ& at the end of the tube 3. The claw 4x formed on the inner pipe 4& is inserted into the tube 3, locking the inner pipe 4a and the tube 3, and the claw 6X formed on the outer vibro a is inserted into the small hole 4y formed on the inner pipe 4a. are bent and inserted, and these connect the tube 3, inner pipe 42L, and outer pipe 52L.
are locked together. The other end of the tube 3 is also locked in the same way, and thus the tube 3, the inner pipes 4i1L, 4b, 40, . . . , the outer side 5a.
5b、60・・・・・・は長手方向にずれることはない
。5b, 60, . . . do not shift in the longitudinal direction.
本実施例では爪等でこれらを係止したが、単に接着して
も良い。In this embodiment, these are fixed with nails or the like, but they may be simply glued.
以上のように構成した光フアイバーケーブルを曲げると
、内側パイプ41L、4b、4c・・団・と外側パイプ
5a、5b、5c・・・・・・は、第3図の断面図に示
すように、ある曲率半径でもって内側パイプ外表面と外
側パイプ内表面が当接し、この曲率以下には曲げること
ができない。このときの曲率を光ファインにの破断面よ
り大きくとっておけば光ファイバーの折損を防ぐことが
できる。この曲率よシ大きい範囲の曲げに対しては顆め
て柔軟に曲げることができる。When the optical fiber cable configured as described above is bent, the inner pipes 41L, 4b, 4c, etc. and the outer pipes 5a, 5b, 5c, etc. are formed as shown in the cross-sectional view of FIG. , the outer surface of the inner pipe and the inner surface of the outer pipe abut with a certain radius of curvature, and cannot be bent below this radius of curvature. If the curvature at this time is set larger than the fracture surface of the optical fiber, breakage of the optical fiber can be prevented. It can be bent flexibly in a range larger than this curvature.
この曲率は内側パイプ4a、4b、40・・・・・・と
外(IUバイブ5J 5b、50・・・・・・との隙間
、及びそれらのパイプの長さによって決まる。光フアイ
バーケーブル端部近傍は頻繁なくシ返し曲げを受けるこ
とが多いので、この部分のパイプを長く取り曲率を大き
くすれば、光ファイバーの折損に対してよシ安全な対策
となる。また本実施例で示した光フアイバーケーブルの
端面に集光レンズ等のハンドピースを取り付けることも
可能である。This curvature is determined by the gap between the inner pipes 4a, 4b, 40... and the outside (IU Vibe 5J 5b, 50...) and the length of those pipes. Optical fiber cable end Since the vicinity of the pipe is often bent infrequently, making the pipe longer in this area and increasing the curvature will provide a safer measure against breakage of the optical fiber.Also, the optical fiber shown in this example It is also possible to attach a handpiece such as a condensing lens to the end face of the cable.
発明の効果
以上のように本発明によれば、内側パイプと外側パイプ
をそれぞれ複数個設け、チューブに係止することによシ
、両パイプの当接によって光ファイバーの曲げを制限す
ることができ、光ファイバーの折損をなくすことができ
るものでおる。Effects of the Invention As described above, according to the present invention, by providing a plurality of inner pipes and a plurality of outer pipes and locking them to the tube, bending of the optical fiber can be restricted by abutment of both pipes. This is something that can eliminate breakage of optical fibers.
【図面の簡単な説明】
第1図は本発明の一実施例における光ファイバーケーグ
Iしの断面図、第2図は同実施例のチューブ端面部の斜
視図、第3図は内側パイプの当接状態を示す断面図であ
る。
1.2・・・・・・光ファイバー、3・・・・・チュー
ブ、4 a + 4b + 4 c ・・・・−内側パ
イプ、sa、sb。
6C・・・・・・外側パイプ。
代理人の氏名 弁理士 中 尾 敏 男 はが1名第1
図
第3図[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a sectional view of an optical fiber cage I according to an embodiment of the present invention, Fig. 2 is a perspective view of the end face of the tube of the same embodiment, and Fig. 3 is a view of the inner pipe. FIG. 1.2...Optical fiber, 3...Tube, 4 a + 4b + 4 c...-inner pipe, sa, sb. 6C...Outside pipe. Name of agent: Patent attorney Toshio Nakao (1st person)
Figure 3
Claims (1)
の内側パイプを密接して挿着し、前記複数の内側パイプ
の各端面部同士が隣接する部分を覆うように複数の外側
パイプを密接して遊嵌するとともに、端部に位置する前
記外側パイプと前記内側パイプと前記チューブ端部を互
いに係止してなる光フアイバーケーブル。 <2) 光ファイバーの端部近傍の外側パイプまたは内
側パイプの長さが中央部に比べて長いことを特徴とする
特許請求の範囲第1項記載の光フアイバーケーブル。(1) A plurality of inner pipes are closely inserted into the outside of a tube in which optical fibers are installed, and a plurality of outer pipes are closely inserted so that the respective end surfaces of the plurality of inner pipes cover adjacent portions. An optical fiber cable in which the outer pipe, the inner pipe, and the tube end located at the ends are loosely fitted and locked to each other. <2) The optical fiber cable according to claim 1, wherein the length of the outer pipe or the inner pipe near the end of the optical fiber is longer than that of the central part.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58218094A JPS60108813A (en) | 1983-11-18 | 1983-11-18 | Optical fiber cable |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58218094A JPS60108813A (en) | 1983-11-18 | 1983-11-18 | Optical fiber cable |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60108813A true JPS60108813A (en) | 1985-06-14 |
JPH0139562B2 JPH0139562B2 (en) | 1989-08-22 |
Family
ID=16714532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58218094A Granted JPS60108813A (en) | 1983-11-18 | 1983-11-18 | Optical fiber cable |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60108813A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4850084A (en) * | 1987-03-17 | 1989-07-25 | Nippon Cable System Inc. | Structure for anchoring wire end |
US4875757A (en) * | 1986-06-20 | 1989-10-24 | Northern Telecom Limited | Optical cable |
JP2007131236A (en) * | 2005-11-11 | 2007-05-31 | Delta Kogyo Co Ltd | Operation input device for automatic transmission |
-
1983
- 1983-11-18 JP JP58218094A patent/JPS60108813A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4875757A (en) * | 1986-06-20 | 1989-10-24 | Northern Telecom Limited | Optical cable |
US4850084A (en) * | 1987-03-17 | 1989-07-25 | Nippon Cable System Inc. | Structure for anchoring wire end |
JP2007131236A (en) * | 2005-11-11 | 2007-05-31 | Delta Kogyo Co Ltd | Operation input device for automatic transmission |
Also Published As
Publication number | Publication date |
---|---|
JPH0139562B2 (en) | 1989-08-22 |
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