JP2014232272A - Optical fiber holder - Google Patents
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本発明は、例えば光コネクターなどに用いられる光ファイバー保持装置に係り、特に光ファイバー保持装置の中でも、ＬＣフェルールなどで使用される外径が１２５μｍなど極細の光ファイバーを保持するのに好適な光ファイバーの保持構造に関するものである。 The present invention relates to an optical fiber holding device used for, for example, an optical connector, and in particular, an optical fiber holding structure suitable for holding an ultrafine optical fiber having an outer diameter of 125 μm used in an LC ferrule among optical fiber holding devices. It is about.
通常、ＳＣフェルールは外径２．５ｍｍ、長さ８ｍｍであるのに対して前記ＬＣフェルールは外径１．２５ｍｍ、長さ５ｍｍの小型サイズであり、近年、この小型フェルールの使用が増大している。 Usually, the SC ferrule has an outer diameter of 2.5 mm and a length of 8 mm, whereas the LC ferrule has a small size of an outer diameter of 1.25 mm and a length of 5 mm. In recent years, the use of this small ferrule has increased. Yes.
従来、ＬＣフェルールなどを使用して通信用の光ファイバーを固定する場合、使用される光ファイバーの外径は１２５μｍであり、非常に細いため接着剤を使用してフェルールに光ファイバーを固定していた。 Conventionally, when an optical fiber for communication is fixed using an LC ferrule or the like, the outer diameter of the optical fiber to be used is 125 μm, and since it is very thin, the optical fiber is fixed to the ferrule using an adhesive.
一方、外径が比較的太い光ファイバーでは、それを取りまく各部材がバネなどの力によって光ファイバーを径方向に加圧することにより、フェルールへの光ファイバーの固定と固定解除を行うものなどが、例えば下記特許文献１〜７のように種々提案されている。 On the other hand, in the case of an optical fiber having a relatively large outer diameter, each member surrounding the optical fiber presses the optical fiber in the radial direction by the force of a spring or the like, thereby fixing and releasing the optical fiber from the ferrule. Various proposals have been proposed as in References 1-7.
その中で、温度変化などの周囲の環境条件が変わっても、また多少部品寸法にバラツキがあっても、無理な応力が発生することが無い光ファイバー保持装置の提案がある（特許第２６３３６９９号公報：特許文献１参照）。 Among them, there is a proposal of an optical fiber holding device that does not generate excessive stress even if the surrounding environmental conditions such as temperature change change or there is some variation in component dimensions (Japanese Patent No. 2633699). : Patent Document 1).
図２３ならびに図２４はその特許文献１に記載の光ファイバー保持装置を説明するための図で、図２３は光ファイバー保持装置の光ファイバー保持前の状態を示す切断正面図、図２４は光ファイバー保持装置の光ファイバー保持後の状態を示す切断正面図である。 23 and 24 are diagrams for explaining the optical fiber holding device described in Patent Document 1, FIG. 23 is a cut front view showing a state of the optical fiber holding device before holding the optical fiber, and FIG. 24 is an optical fiber of the optical fiber holding device. It is the cutting | disconnection front view which shows the state after holding | maintenance.
この光ファイバー保持装置は、フェルール１０１と、弾性管状体１０２と、押圧管１０３と、ホルダ１０４と、ワッシャ１０５と、コイルスプリング１０６の６部品より構成されている。 This optical fiber holding device is composed of six parts including a ferrule 101, an elastic tubular body 102, a pressing tube 103, a holder 104, a washer 105, and a coil spring 106.
前記フェルール１０１の先端部には、光ファイバー１０７の外径と略同寸の透孔１０８が形成されている。前記弾性管状体１０２は図２３に示すように、図面に向かって、左半分は周方向に連続した周壁を持った基管部１０９となっている。一方、右半分は右側端から軸方向に沿って所定の長さの切り込み溝（図示せず）が中心軸を基準に対称位置に２本形成されて、上下方向に向けて末広がり状になった弾性片部１１０が設けられている。 At the tip of the ferrule 101, a through hole 108 having the same size as the outer diameter of the optical fiber 107 is formed. As shown in FIG. 23, the elastic tubular body 102 is a base tube portion 109 having a peripheral wall continuous in the circumferential direction on the left half as viewed in the drawing. On the other hand, in the right half, two slits (not shown) having a predetermined length along the axial direction from the right end are formed at symmetrical positions with respect to the central axis, and are widened toward the vertical direction. An elastic piece 110 is provided.
前記押圧管１０３は円管状をしており、それの内周面の途中位置に径方向内側に向けて傾斜した押圧傾斜部１１１が設けられている。また、押圧管１０３の図面に向かって右側端にはジャケット保持部１１２が形成されている。 The pressing tube 103 has a circular tubular shape, and a pressing inclined portion 111 that is inclined radially inward is provided at an intermediate position on the inner peripheral surface thereof. A jacket holding portion 112 is formed at the right end of the pressing tube 103 as viewed in the drawing.
前記ホルダ１０４はフェルール１０１と弾性管状体１０２の間に介在され、そのホルダ１０４の外周にはつば部１１３が一体に設けられている。前記ワッシャ１０５は押圧管１０３の先端部外周に取り付けられており、このワッシャ１０５とつば部１１３の間にコイルスプリング１０６が介在されている。
なお、符号１１５は、光ファイバー１０７を被覆しているジャケットである。
The holder 104 is interposed between the ferrule 101 and the elastic tubular body 102, and a collar portion 113 is integrally provided on the outer periphery of the holder 104. The washer 105 is attached to the outer periphery of the distal end portion of the pressing tube 103, and a coil spring 106 is interposed between the washer 105 and the flange portion 113.
Reference numeral 115 denotes a jacket covering the optical fiber 107.
次にこの光ファイバー保持装置の組み立て方法について説明する。
まず、フェルール１０１と、弾性管状体１０２と、押圧管１０３と、ホルダ１０４と、ワッシャ１０５と、コイルスプリング１０６を図２３に示すように組み合わせる。この状態ではコイルスプリング１０６はまだ圧縮されておらず、弾性管状体１０２の２つ割れになった弾性片部１１０の後端部は、押圧管１０３の押圧傾斜部１１１と対向しているだけで、押圧傾斜部１１１を乗り上げてはいない。
Next, a method for assembling the optical fiber holding device will be described.
First, the ferrule 101, the elastic tubular body 102, the pressing tube 103, the holder 104, the washer 105, and the coil spring 106 are combined as shown in FIG. In this state, the coil spring 106 has not been compressed yet, and the rear end portion of the elastic piece portion 110 that has been split into two portions of the elastic tubular body 102 is merely opposed to the pressing inclined portion 111 of the pressing tube 103. The pressing inclined portion 111 is not ridden.
この状態で光ファイバー１０７を押圧管１０３のジャケット保持部１１２から入れて、弾性管状体１０２の中を通し、光ファイバー１０７の先端部をフェルール１０１の先端面より少し突出させる。 In this state, the optical fiber 107 is inserted from the jacket holding portion 112 of the pressing tube 103, passed through the elastic tubular body 102, and the distal end portion of the optical fiber 107 is slightly projected from the distal end surface of the ferrule 101.
次に、コイルスプリング１０６の弾性に抗して押圧管１０３をホルダ１０４側に強制的に移動する。そうすることによりコイルスプリング１０６が圧縮され、弾性片部１１０の後端部が押圧管１０３の押圧傾斜部１１１に沿って内側に押圧変形し、押圧管１０３の先端部がつば部１１３の側面に当接したところで、押圧管１０３の移動が停止する。 Next, the pressing tube 103 is forcibly moved to the holder 104 side against the elasticity of the coil spring 106. By doing so, the coil spring 106 is compressed, the rear end portion of the elastic piece portion 110 is pressed and deformed inward along the pressing inclined portion 111 of the pressing tube 103, and the distal end portion of the pressing tube 103 is formed on the side surface of the flange portion 113. At the point of contact, the movement of the pressing tube 103 stops.
押圧管１０３が停止したときには、弾性片部１１０の後端部が押圧管１０３の押圧傾斜部１１１を乗り越えている。それによって弾性片部１１０に弾性挟持力が生じ、弾性片部１１０の折り曲げ開始部１１４付近で光ファイバー１０７の外周部を弾性的に保持・固定する。 When the pressing tube 103 stops, the rear end portion of the elastic piece portion 110 gets over the pressing inclined portion 111 of the pressing tube 103. As a result, an elastic clamping force is generated in the elastic piece portion 110, and the outer peripheral portion of the optical fiber 107 is elastically held and fixed in the vicinity of the bending start portion 114 of the elastic piece portion 110.
この図２３ならびに図２４に示す光ファイバー保持装置は、部品点数が多く、構造が複雑で、組み立て作業が煩雑であるなどの難点を有している。この難点を解消するため、本出願人が先に特許出願をした（特願２０１３−０２４６８３号）。 The optical fiber holding device shown in FIG. 23 and FIG. 24 has the disadvantages that the number of parts is large, the structure is complicated, and the assembly work is complicated. In order to eliminate this difficulty, the applicant filed a patent application first (Japanese Patent Application No. 2013-024683).
図２５ならびに図２６はこの特許出願をした光ファイバー保持装置を説明するための図で、図２５は光ファイバー保持装置の光ファイバー保持前の状態を示す切断正面図、図２６は光ファイバー保持装置の光ファイバー保持後の状態を示す切断正面図である。 FIG. 25 and FIG. 26 are diagrams for explaining the optical fiber holding device filed in this patent application. FIG. 25 is a cut front view showing the state of the optical fiber holding device before holding the optical fiber, and FIG. It is the cutting | disconnection front view which shows this state.
この光ファイバー保持装置は図２５に示すように、フェルール２０１と、円管状をした第１つば部材２０２と、同じく円管状をした第２つば部材２０３の３部品から構成されている。 As shown in FIG. 25, the optical fiber holding device includes three parts: a ferrule 201, a first collar member 202 having a tubular shape, and a second collar member 203 having a similar tubular shape.
前記フェルール２０１の中心軸には、ファイバー挿入孔２０４が貫通するように形成されている。フェルール２０１の後端面（図面に向かって右側端面）からフェルール２０１の軸方向内側に向けて、２本のスリット（図示せず）がフェルール２０１の中心軸を基準にして略対象位置に形成されている。 A fiber insertion hole 204 is formed through the central axis of the ferrule 201 so as to penetrate therethrough. Two slits (not shown) are formed at substantially the target position with respect to the central axis of the ferrule 201 from the rear end surface (right end surface toward the drawing) of the ferrule 201 toward the inner side in the axial direction of the ferrule 201. Yes.
このスリットの形成により、２つの弾性片部２０５が上下に設けられる。さらにこの弾性片部２０５は、スリットの長さ方向の略中間位置に設定した折り曲げ開始部２０６を基点として径方向外側に向けて末広がり状に屈曲されて、弾性片部２０５に弾性が付与されている。 By forming this slit, two elastic piece portions 205 are provided up and down. Further, the elastic piece portion 205 is bent in a diverging shape outwardly in the radial direction with a bending start portion 206 set at a substantially intermediate position in the slit length direction as a base point, and elasticity is given to the elastic piece portion 205. Yes.
前記第１つば部材２０２は、先端部側に設けられて径方向外側に突出した第１つば部２０７と、その第１つば部２０７の後方に一体に設けられた円管状の絞り部２０８とから構成されている。この第１つば部材２０２は、フェルール２０１の外側にスライド可能に装着される。 The first collar member 202 includes a first collar part 207 provided on the tip end side and projecting radially outward, and a circular tubular throttle part 208 provided integrally behind the first collar part 207. It is configured. The first collar member 202 is slidably attached to the outside of the ferrule 201.
前記第２つば部材２０３は、先端部側に設けられて径方向外側に突出した第２つば部２０９と、その第２つば部２０９の後方に一体に設けられた横凹形のフェルール後部収納部２１０と、フェルール後部収納部２１０の後方に設けられたジャケット収納部２１１から構成されている。 The second collar member 203 includes a second collar part 209 that is provided on the front end side and protrudes radially outward, and a laterally concave ferrule rear housing part that is integrally provided behind the second collar part 209. 210 and a jacket storage portion 211 provided behind the ferrule rear storage portion 210.
次にこの光ファイバー保持装置の組み立て方法について説明する。
まず、第１つば部材２０２をフェルール２０１の先端部側から嵌め込む。この嵌め込みは、絞り部２０８の後端部が弾性片部２０５の折り曲げ開始部２０６付近に来た所で停止する。そして弾性片部２０５の後端部側からフェルール２０１と第１つば部材２０２の一部を第２つば部２０９のフェルール後部収納部２１０に挿入する。この挿入は、弾性片部２０５の後端部がフェルール後部収納部２１０の側面に当接した所で停止する。
Next, a method for assembling the optical fiber holding device will be described.
First, the first collar member 202 is fitted from the tip end side of the ferrule 201. This fitting stops when the rear end portion of the narrowed portion 208 comes near the bending start portion 206 of the elastic piece portion 205. Then, the ferrule 201 and a part of the first collar member 202 are inserted into the ferrule rear housing part 210 of the second collar part 209 from the rear end side of the elastic piece part 205. This insertion stops when the rear end portion of the elastic piece portion 205 comes into contact with the side surface of the ferrule rear housing portion 210.
第１つば部材２０２は押し込む前の状態であるから、図２５に示すように、第１つば部２０７は第２つば部２０９と所定の間隔離れて対向している。
光ファイバー２１２の先端部を、第２つば部材２０３のジャケット収納部２１１からフェルール２０１のファイバー挿入孔２０４を通して挿通し、光ファイバー２１２を保護しているジャケット２１３の先端部がジャケット収納部２１１の端面に当接した所で光ファイバー２１２の挿入を停止する。この状態で光ファイバー２１２の先端部は、フェルール２０１の先端面より少し外側に突出している（図２５参照）。
Since the first collar member 202 is in a state before being pushed in, as shown in FIG. 25, the first collar part 207 is opposed to the second collar part 209 while being separated by a predetermined distance.
The front end of the optical fiber 212 is inserted from the jacket storage portion 211 of the second collar member 203 through the fiber insertion hole 204 of the ferrule 201, and the front end of the jacket 213 protecting the optical fiber 212 contacts the end surface of the jacket storage portion 211. At the point of contact, the insertion of the optical fiber 212 is stopped. In this state, the tip of the optical fiber 212 protrudes slightly outside the tip of the ferrule 201 (see FIG. 25).
次に第２つば部材２０３に対して第１つば部材２０２をフェルール後部収納部２１０側に強制的に押し込む。この押し込みにより、第１つば部材２０２の絞り部２０８はフェルール２０１の弾性片部２０５の上に乗り上げ、傾斜していた弾性片部２０５を抑えつけながら、第１つば部２０７が第２つば部２０９と当接する所まで押し込まれる（図２６参照）。 Next, the first collar member 202 is forcibly pushed into the ferrule rear housing part 210 side with respect to the second collar member 203. By this pushing, the narrowed portion 208 of the first collar member 202 rides on the elastic piece portion 205 of the ferrule 201, and the first collar portion 207 becomes the second collar portion 209 while suppressing the inclined elastic piece portion 205. Until it comes into contact with (see FIG. 26).
この第１つば部材２０２の押し込みにより、傾斜していた各弾性片部２０５は光ファイバー２１２の外周に弾性的に押し付けられて、特に弾性片部２０５の折り曲げ開始部２０６付近において、光ファイバー２１２を弾性的に挟持・固定する。 By the pushing of the first collar member 202, the inclined elastic piece portions 205 are elastically pressed against the outer periphery of the optical fiber 212, and the optical fiber 212 is made elastic, particularly in the vicinity of the bending start portion 206 of the elastic piece portion 205. Hold and fix to.
なお、光ファイバー保持装置の先行技術文献として前記特許文献１の他に、例えば特許文献２〜７などを挙げることができる。 In addition to Patent Document 1, for example, Patent Documents 2 to 7 can be cited as prior art documents of the optical fiber holding device.
従来の例えば図２３，２４に示すような光ファイバー保持装置では、構造が複雑なため、太さが従来の半分しかないＬＣフェルールなどの小型フェルールに適用しようとすると、加圧部品（例えば図２３，２４においては、複数の弾性片部１１０を有する弾性管状体１０２やホルダ１０４など）が小さくなり過ぎて、十分な保持力が得られ難いという欠点を有している。 The conventional optical fiber holding device as shown in FIGS. 23 and 24 has a complicated structure. Therefore, when it is applied to a small ferrule such as an LC ferrule whose thickness is only half that of the conventional optical fiber holding device, a pressure component (for example, FIG. 24, the elastic tubular body 102 and the holder 104 having a plurality of elastic pieces 110 are too small, and it is difficult to obtain a sufficient holding force.
また、図２３，２４に示す光ファイバー保持装置では、結局、弾性管状体１０２の折り曲げ開始部１１４の２点で光ファイバー１０７を上下から挟む構造であり、また、図２５，２６に示す光ファイバー保持装置でも、結局、フェルール２０１の折り曲げ開始部２０６の２点で光ファイバー２１２を上下から挟む構造であるから、光ファイバーとの接触面積が狭く、局部的な挟持構造になることから、光ファイバーに損傷を与える懸念がある。 23 and 24, the optical fiber 107 is sandwiched from above and below at two points of the bending start portion 114 of the elastic tubular body 102. Also, the optical fiber holding device shown in FIGS. After all, since the optical fiber 212 is sandwiched from above and below at the two points of the bending start portion 206 of the ferrule 201, the contact area with the optical fiber is narrow, and a local sandwiching structure is formed, which may cause damage to the optical fiber. is there.
この光ファイバー保持装置で特に外径１２５μｍなどの極細の光ファイバーを保持しようとする場合には、細い光ファイバーに対する前記折り曲げ開始部の押圧力が過大にならないようにするために、光ファイバーへの押圧力を小さい値に抑えなければならず、そのために十分な把持固定力を得ることが容易でない。
このような技術的課題は特許文献１だけではなく、例えば特許文献２や５などにおいても同様に起こり得る課題である。
When an ultrafine optical fiber having an outer diameter of 125 μm or the like is to be held with this optical fiber holding device, the pressing force on the optical fiber is small so that the pressing force of the bending start portion on the thin optical fiber does not become excessive. Therefore, it is not easy to obtain a sufficient gripping and fixing force.
Such a technical problem is a problem that can occur not only in Patent Document 1, but also in Patent Documents 2 and 5, for example.
本発明の目的は、このような従来技術の課題を解消して、シンプルな構造でありながら、細い光ファイバーでも損傷を与えることなく、確実に保持することのできる信頼性の高い光ファイバー保持装置を提供することにある。 The object of the present invention is to provide a highly reliable optical fiber holding device that can reliably hold a thin optical fiber without damaging it even though it has a simple structure, eliminating the problems of the prior art. There is to do.
前記目的を達成するため、本発明の第１の手段は、
中心軸に光ファイバーの外径より僅かに大きいファイバー挿入孔を有し、一方の端面から軸方向内側に沿って前記光ファイバーの外径（Ｄ１）より狭い幅（Ｗ１）の第１隙間（Ｄ１＞Ｗ１）が、中心軸を基準にしてほぼ対称位置に形成されて、ストレートに延びた複数の第１弾性片部を有する第１管状弾性部材と、
一方の端面から軸方向内側に沿って前記第１管状弾性部材を収容する第１管状弾性部材収納部を形成し、その第１管状弾性部材収納部の周壁部の一方の端面から第１管状弾性部材収納部の途中まで延びた、前記第１管状弾性部材の外径（Ｄ２）より狭い幅（Ｗ２）の第２隙間（Ｄ２＞Ｗ２）が、中心軸を基準にしてほぼ対称位置に形成されて、複数の第２弾性片部を有する第２管状弾性部材２を備え、
前記第２弾性片部は、その長手方向の途中から前記一方の端面に行くに従って互いに離れるように屈曲しており、
前記第２管状弾性部材の第１管状弾性部材収納部に前記第１管状弾性部材を収容した状態で、前記第１管状弾性部材の第１弾性片部は前記第２弾性片部の折り曲げ開始部の内側にあり、
前記第２管状弾性部材の複数の第２弾性片部の先端部付近を径方向内側に向けて弾性変形することにより、第２弾性片部の折り曲げ開始部が、ストレートに延びた複数の第１弾性片部を径方向内側に押圧して、複数の第１弾性片部の内面により前記光ファイバーを弾性的に挟持することを特徴とするものである。
In order to achieve the above object, the first means of the present invention comprises:
A first gap (D1> W1) having a fiber insertion hole slightly larger than the outer diameter of the optical fiber in the central axis and having a width (W1) narrower than the outer diameter (D1) of the optical fiber along the inner side in the axial direction from one end face. ) Is formed in a substantially symmetrical position with respect to the central axis, and has a first tubular elastic member having a plurality of first elastic piece portions extending straight.
A first tubular elastic member accommodating portion that accommodates the first tubular elastic member is formed along the axially inner side from one end surface, and the first tubular elastic member is formed from one end surface of the peripheral wall portion of the first tubular elastic member accommodating portion. A second gap (D2> W2) having a width (W2) narrower than the outer diameter (D2) of the first tubular elastic member extending to the middle of the member storage portion is formed at a substantially symmetrical position with respect to the central axis. A second tubular elastic member 2 having a plurality of second elastic pieces,
The second elastic piece portions are bent so as to be separated from each other as they go from the middle in the longitudinal direction to the one end surface,
In a state where the first tubular elastic member is accommodated in the first tubular elastic member accommodating portion of the second tubular elastic member, the first elastic piece portion of the first tubular elastic member is a bending start portion of the second elastic piece portion. Inside
By elastically deforming the vicinity of the tip end portions of the plurality of second elastic piece portions of the second tubular elastic member inward in the radial direction, the bending start portion of the second elastic piece portion is a plurality of first pieces extending straight. The elastic piece portion is pressed inward in the radial direction, and the optical fiber is elastically held by the inner surfaces of the plurality of first elastic piece portions.
本発明の第２の手段は前記第１の手段において、
前記第１管状弾性部材は軸方向に亘って第１分割体と第２分割体に分割され、前記第１分割体と第２分割体は互いに相手側に向かう部分の片側が長く延びた形状をしており、その長く延びた片側部分が互いに重なるようにして前記第１管状弾性部材が前記第２管状弾性部材の第１管状弾性部材収納部に収容されることを特徴とするものである。
According to a second means of the present invention, in the first means,
The first tubular elastic member is divided into a first divided body and a second divided body in the axial direction, and the first divided body and the second divided body have a shape in which one side of a portion facing each other extends long. The first tubular elastic member is housed in the first tubular elastic member housing portion of the second tubular elastic member so that the long one side portions thereof overlap each other.
本発明の第３の手段は前記第１または第２の手段において、
前記光ファイバーはジャケットで被覆されており、
前記第２管状弾性部材の第１管状弾性部材収納部に前記第１管状弾性部材を収容した状態で、前記第２弾性部片の後端部が前記第１弾性部片の後端部よりも前記ジャケット側に長く延びており、
前記第２弾性部片で第１弾性部片を径方向内側に押圧すると共に、前記第２弾性部片の後端部で前記ジャケットの先端部を弾性的に挟持することを特徴とするものである。
A third means of the present invention is the first or second means,
The optical fiber is covered with a jacket,
In a state where the first tubular elastic member is housed in the first tubular elastic member housing portion of the second tubular elastic member, the rear end portion of the second elastic portion piece is more than the rear end portion of the first elastic portion piece. It extends long to the jacket side,
The first elastic part piece is pressed radially inward by the second elastic part piece, and the front end part of the jacket is elastically sandwiched by the rear end part of the second elastic part piece. is there.
本発明は前述のような構成になっており、シンプルな構造でありながら、例えば外径１２５μｍなどの極細の光ファイバーでも損傷を与えることなく、確実に保持することのできる信頼性の高い光ファイバー保持装置を提供することができる。 The present invention has a configuration as described above, and has a simple structure, but can be reliably held without damaging even a very thin optical fiber having an outer diameter of 125 μm, for example, and having high reliability. Can be provided.
次に本発明の各実施例に係る光ファイバー保持装置について図面を用いて説明する。本発明の各実施例に係る光ファイバー保持装置は、小型のたとえばＬＣフェルールに適用される。 Next, the optical fiber holding device according to each embodiment of the present invention will be described with reference to the drawings. The optical fiber holding device according to each embodiment of the present invention is applied to a small-sized LC ferrule, for example.
図１ないし図６は実施例１に係る光ファイバー保持装置を説明するための図で、図１は光ファイバー保持装置の光ファイバー保持前の状態を示す切断正面図、図２は図１Ｘ−Ｘ線上の拡大切断側面図、図３は図１Ｙ−Ｙ線上の拡大切断側面図、図４は光ファイバー保持装置の光ファイバー保持後の状態を示す切断正面図、図５は本実施例で用いられる第１管状弾性部材の正面図、図６は本実施例で用いられる第２管状弾性部材の切断正面図である。 1 to 6 are diagrams for explaining the optical fiber holding device according to the first embodiment. FIG. 1 is a cut front view showing a state of the optical fiber holding device before holding the optical fiber, and FIG. 2 is an enlarged view along the line XX in FIG. FIG. 3 is an enlarged cut side view taken along line YY of FIG. 1, FIG. 4 is a cut front view showing a state of the optical fiber holding device after holding the optical fiber, and FIG. 5 is a first tubular elastic member used in this embodiment. FIG. 6 is a cut front view of a second tubular elastic member used in this embodiment.
本実施例に係る光ファイバー保持装置は、例えば図１に示すように、第１管状弾性部材１と、第２管状弾性部材２と、第１つば部材３と、第２つば部材４の４部品で構成されており、前記４部品は金属からなる。 The optical fiber holding device according to the present embodiment includes, for example, as shown in FIG. 1, four parts including a first tubular elastic member 1, a second tubular elastic member 2, a first collar member 3, and a second collar member 4. The four parts are made of metal.
前記第１管状弾性部材１は全体が細い管状体（チューブ）からなり、例えば図５に示すように、図面に向かって約左半分は周方向に連続した周壁を持った基管部５となっている。この第１管状弾性部材１の中心部には、光ファイバー（ガラス素線）６の外径（１２５μｍ）より僅かに大きいファイバー挿入孔７（図５参照）が貫通するように形成されている。 The first tubular elastic member 1 is composed of a thin tubular body (tube) as a whole. For example, as shown in FIG. 5, the left half of the first tubular elastic member 1 is a base tube portion 5 having a circumferential wall continuous in the circumferential direction. ing. A fiber insertion hole 7 (see FIG. 5) that is slightly larger than the outer diameter (125 μm) of the optical fiber (glass strand) 6 is formed through the center of the first tubular elastic member 1.
一方、図面に向かって約右半分には右側端から軸方向に沿って所定の長さのスリット状をした第１隙間８を中心軸を基準にして左右対称位置に２本形成し（図２参照）、それによって途中が屈曲していないでストレートに延びた第１弾性片部９が上下に２本設けられている。 On the other hand, in the right half of the drawing, two first gaps 8 having a slit shape with a predetermined length along the axial direction from the right end are formed at symmetrical positions with respect to the central axis (FIG. 2). As a result, two first elastic piece portions 9 that extend straight without being bent in the middle are provided.
図２に示すように、第１隙間８の隙間幅Ｗ１は、光ファイバー６の外径Ｄ１より僅かに狭くなっている（Ｗ１＜Ｄ１）。また、第１管状弾性部材１の中心軸には予めファイバー挿入孔７が形成されているため、第１弾性片部９を形成した際に、その第１弾性片部９の内周には光ファイバー６の外周面に沿う断面形状が円弧状の内周面１０が形成される。図３に、光ファイバー６の一部を切除して、円弧状の内周面１０を示している。
また図５において、第１弾性片部９の図面に向かって右端部には、光ファイバー６の挿入を案内するための傾斜面１１が設けられている。
As shown in FIG. 2, the gap width W1 of the first gap 8 is slightly narrower than the outer diameter D1 of the optical fiber 6 (W1 <D1). Further, since the fiber insertion hole 7 is formed in advance on the central axis of the first tubular elastic member 1, when the first elastic piece portion 9 is formed, an optical fiber is provided on the inner periphery of the first elastic piece portion 9. An inner peripheral surface 10 having a circular cross section along the outer peripheral surface 6 is formed. FIG. 3 shows an arcuate inner peripheral surface 10 by cutting a part of the optical fiber 6.
In FIG. 5, an inclined surface 11 for guiding insertion of the optical fiber 6 is provided at the right end portion of the first elastic piece portion 9 in the drawing.
前記第２管状弾性部材２も全体が細長い管状体（チューブ）からなり、例えば図６に示すように、図面に向かって約左半分には周方向に連続した周壁を持った基管部１２となっている。この基管部１２の中心部には、光ファイバー６の外径（１２５μｍ）より僅かに大きい（前記ファイバー挿入孔７と同径の）ファイバー挿入孔１３が貫通するように形成されている。 The second tubular elastic member 2 is also composed of an elongated tubular body (tube) as a whole. For example, as shown in FIG. 6, a base tube portion 12 having a circumferential wall continuous in the circumferential direction on the left half of the drawing. It has become. A fiber insertion hole 13 slightly larger than the outer diameter (125 μm) of the optical fiber 6 (having the same diameter as the fiber insertion hole 7) is formed in the center of the base tube portion 12 so as to penetrate therethrough.
図６の図面に向かって約右半分には、内径が第１管状弾性部材１の外径より僅かに大きく、長さが第１管状弾性部材１の長さと略等しい第１管状弾性部材収納部１４が形成されている。 In the right half of the drawing of FIG. 6, the first tubular elastic member housing portion has an inner diameter slightly larger than the outer diameter of the first tubular elastic member 1 and a length substantially equal to the length of the first tubular elastic member 1. 14 is formed.
この第１管状弾性部材収納部１４の図６の図面に向かって右側端から軸方向に沿って所定の長さのスリット状をした第２隙間１５を、中心軸を基準にして左右対称位置に２本形成し（図３参照）、それによって第２弾性片部１６が上下に２本設けられている。 The second gap 15 having a slit shape with a predetermined length along the axial direction from the right end toward the drawing of FIG. 6 of the first tubular elastic member housing portion 14 is set to a symmetrical position with respect to the central axis. Two are formed (refer to FIG. 3), whereby two second elastic pieces 16 are provided on the upper and lower sides.
図６に示すように、第２弾性片部１６は途中位置に折り曲げ開始部１７があって、それを基点として第２弾性片部１６の開放端に向けて互いに離れる方向に向けて、略「く」の字状に屈曲されている。 As shown in FIG. 6, the second elastic piece portion 16 has a bending start portion 17 at an intermediate position, and is directed toward the opening end of the second elastic piece portion 16 toward the opening end of the second elastic piece portion 16. It is bent in the shape of "".
図２に示すように、第２隙間１５の隙間幅Ｗ２（図６に示すように折り曲げ開始部１７よりも内側の隙間幅Ｗ２）は、第１管状弾性部材１の外径Ｄ２より狭く設計されている（Ｗ２＜Ｄ２）。 As shown in FIG. 2, the gap width W2 of the second gap 15 (the gap width W2 inside the bending start portion 17 as shown in FIG. 6) is designed to be narrower than the outer diameter D2 of the first tubular elastic member 1. (W2 <D2).
前記第１つば部材３は図１に示すように、径方向外側に突出した第１つば部１８と、それと一体になった円筒状押圧部１９から構成されている。第１つば部材３の中心部には、第２管状弾性部材２が挿入される第２管状弾性部材挿入穴が貫通して設けられて、第１つば部材３は第２管状弾性部材２の周面上をスライドできるようになっている。 As shown in FIG. 1, the first collar member 3 includes a first collar portion 18 that protrudes radially outward, and a cylindrical pressing portion 19 that is integrated therewith. A central portion of the first collar member 3 is provided with a second tubular elastic member insertion hole through which the second tubular elastic member 2 is inserted, and the first collar member 3 is arranged around the second tubular elastic member 2. You can slide on the surface.
前記第２つば部材４は図１に示すように、径方向外側に突出した第２つば部２０と、その第２つば部２０と一体になった円筒状の第２弾性部片収納部２１と、その第２弾性部片収納部２１と一体になったジャケット保持部２２から構成されている。 As shown in FIG. 1, the second collar member 4 includes a second collar part 20 projecting radially outward, and a cylindrical second elastic part storage part 21 integrated with the second collar part 20. The jacket holding portion 22 is integrated with the second elastic piece storage portion 21.
第２弾性部片収納部２１の内径は第１つば部材３の円筒状押圧部１９の外径より僅かに大きく設計されて、第１つば部材３のスライドを許容している。また、ジャケット保持部２２の内径は光ファイバー６を保護するために設けられているジャケット２３の外径より僅かに大きく設計されて、ジャケット２３の先端部が収納・保持できるようになっている。 The inner diameter of the second elastic piece storage portion 21 is designed to be slightly larger than the outer diameter of the cylindrical pressing portion 19 of the first collar member 3 to allow the first collar member 3 to slide. Further, the inner diameter of the jacket holding portion 22 is designed to be slightly larger than the outer diameter of the jacket 23 provided to protect the optical fiber 6 so that the front end portion of the jacket 23 can be stored and held.
図１に示すように、光ファイバー６を保持・固定する前の状態で、第１管状弾性部材１の外側に第２管状弾性部材２が配置され、その外側に第１つば部材３が配置され、さらにその外側に第２つば部材４が配置されている。 As shown in FIG. 1, in a state before holding / fixing the optical fiber 6, the second tubular elastic member 2 is disposed outside the first tubular elastic member 1, and the first collar member 3 is disposed outside thereof. Furthermore, the 2nd collar member 4 is arrange | positioned on the outer side.
第２管状弾性部材２のファイバー挿入孔１３（図６参照）と第１管状弾性部材収納部１４の間には傾斜した内周面を有する位置決め部２４が設けられており、第１管状弾性部材１を第１管状弾性部材収納部１４に挿入した際、第１管状弾性部材１の先端部が位置決め部２４の傾斜した内周面に当接して位置決めされることにより、第１管状弾性部材１のファイバー挿入孔７と第２管状弾性部材２のファイバー挿入孔１３の芯合わせが自動的になされる。 A positioning portion 24 having an inclined inner peripheral surface is provided between the fiber insertion hole 13 (see FIG. 6) of the second tubular elastic member 2 and the first tubular elastic member storage portion 14, and the first tubular elastic member When the first tubular elastic member 1 is inserted into the first tubular elastic member housing portion 14, the distal end portion of the first tubular elastic member 1 is positioned in contact with the inclined inner peripheral surface of the positioning portion 24. The fiber insertion hole 7 and the fiber insertion hole 13 of the second tubular elastic member 2 are automatically aligned.
また、図２、図３に示すように、第１管状弾性部材１の第１隙間８と第２管状弾性部材２の第２隙間１５が略同じ方向を向くように、目視で確認しながら、第１管状弾性部材１を第２管状弾性部材２内に挿入する。 Further, as shown in FIGS. 2 and 3, while visually confirming that the first gap 8 of the first tubular elastic member 1 and the second gap 15 of the second tubular elastic member 2 are directed in substantially the same direction, The first tubular elastic member 1 is inserted into the second tubular elastic member 2.
さらに、第１管状弾性部材１を第２管状弾性部材２の第１管状弾性部材収納部１４内に収納（位置決め）した状態で、図１に示すように、第２管状弾性部材２における第２弾性片部１６の折り曲げ開始部１７が第１管状弾性部材１の第１弾性片部９の略中間位置上に配置されるように、第１弾性片部９ならびに第２弾性片部１６が設計されている。 Furthermore, in a state where the first tubular elastic member 1 is housed (positioned) in the first tubular elastic member housing portion 14 of the second tubular elastic member 2, as shown in FIG. The first elastic piece portion 9 and the second elastic piece portion 16 are designed so that the bending start portion 17 of the elastic piece portion 16 is disposed at a substantially middle position of the first elastic piece portion 9 of the first tubular elastic member 1. Has been.
光ファイバー６の先端部は第１管状弾性部材１のファイバー挿入孔７から第２管状弾性部材２のファイバー挿入孔１３を挿通して、第２管状弾性部材２の先端面２５より若干前方へ突出している。前述のようにファイバー挿入孔７とファイバー挿入孔１３は予め芯合わせされているから、光ファイバー６に損傷を与えることなく、スムーズに挿入することができる。この状態でジャケット２３の先端部は、第２つば部材４のジャケット保持部２２に収納・保持されている。 The distal end portion of the optical fiber 6 passes through the fiber insertion hole 13 of the second tubular elastic member 2 from the fiber insertion hole 7 of the first tubular elastic member 1 and protrudes slightly forward from the distal end surface 25 of the second tubular elastic member 2. Yes. As described above, since the fiber insertion hole 7 and the fiber insertion hole 13 are pre-centered, they can be smoothly inserted without damaging the optical fiber 6. In this state, the front end portion of the jacket 23 is stored and held in the jacket holding portion 22 of the second collar member 4.
光ファイバー６を保持・固定する前の状態では、図１に示すように、第２管状弾性部材２における第２弾性片部１６の開放端側は末広がり状に広がって、第２管状弾性部材２の外周面より径方向外側に突出して、第２つば部材４の弾性片部収納部２１内に収納されている。 In a state before the optical fiber 6 is held and fixed, as shown in FIG. 1, the open end side of the second elastic piece portion 16 in the second tubular elastic member 2 spreads in a divergent shape, and the second tubular elastic member 2 It protrudes radially outward from the outer peripheral surface and is accommodated in the elastic piece accommodating portion 21 of the second collar member 4.
また、第２管状弾性部材２の開放端側が末広がり状になっていることから、図１に示すように、第１つば部材３における円筒状押圧部１９の開口端部は第２弾性片部１６の折り曲げ開始部１７付近の所で止まっている。 Further, since the open end side of the second tubular elastic member 2 is widened toward the end, as shown in FIG. 1, the opening end portion of the cylindrical pressing portion 19 in the first collar member 3 is the second elastic piece portion 16. It stops at a position near the bending start portion 17.
従ってこの状態で第１つば部材３の円筒状押圧部１９の一部が、第２つば部材４の弾性片部収納部２１内に収納されており、第１つば部材３の第１つば部１８は間隔２６をおいて第２つば部材４の第２つば部２０と対向している。 Accordingly, in this state, a part of the cylindrical pressing portion 19 of the first collar member 3 is accommodated in the elastic piece accommodating portion 21 of the second collar member 4, and the first collar portion 18 of the first collar member 3. Is opposed to the second collar portion 20 of the second collar member 4 with an interval 26 therebetween.
図１の状態で、第１つば部材３の第１つば部１８を第２つば部材４の第２つば部２０側に向けて（矢印Ｚ方向）強制的に移動することにより、第１つば部材３の円筒状押圧部１９が末広がり状に屈曲している第２弾性片部１６の上に乗り上げる。なお、第２つば部材４に対する第１つば部材３の移動には、図示していない所定の治具が用いられる。 In the state of FIG. 1, the first collar member 18 is forcibly moved by moving the first collar portion 18 of the first collar member 3 toward the second collar portion 20 side of the second collar member 4 (in the direction of arrow Z). Three cylindrical pressing portions 19 ride on the second elastic piece portion 16 bent in a divergent shape. A predetermined jig (not shown) is used to move the first collar member 3 with respect to the second collar member 4.
この円筒状押圧部１９の乗り上げにより、図４に示すように第２弾性片部１６は径方向内側に押しすぼめられ、そのときの押圧力は主に第２弾性片部１６の折り曲げ開始部１７を中心として、第１管状弾性部材１の第１弾性片部９に作用する。 As shown in FIG. 4, the second elastic piece 16 is squeezed radially inward by the climbing of the cylindrical pressing portion 19, and the pressing force at that time is mainly the bending start portion 17 of the second elastic piece 16. Acting on the first elastic piece 9 of the first tubular elastic member 1.
この第１弾性片部９は従来と異なり、第１弾性片部９の内側に配置されている光ファイバー６に沿ってフラットな形状をしており、しかも、光ファイバー６と略同曲率の内周面１０が形成されている。この上、下の第１弾性片部９は第２弾性片部１６の押圧力を受けて、局部的でなく、第１弾性片部９と対向している光ファイバー６の部分全体を上、下から弾性的に挟持（保持・固定）することができる。 Unlike the prior art, the first elastic piece portion 9 has a flat shape along the optical fiber 6 disposed on the inner side of the first elastic piece portion 9, and has an inner peripheral surface having substantially the same curvature as the optical fiber 6. 10 is formed. In addition, the lower first elastic piece portion 9 receives the pressing force of the second elastic piece portion 16 and is not localized, and the entire portion of the optical fiber 6 facing the first elastic piece portion 9 is not changed locally. Can be elastically clamped (held and fixed).
光ファイバー６の固定が終了したのち、第１管状弾性部材１の先端面から突出している光ファイバー６の部分を切断する。 After the fixing of the optical fiber 6 is completed, the portion of the optical fiber 6 protruding from the distal end surface of the first tubular elastic member 1 is cut.
図４の状態から第１つば部材３を第２つば部材４から強制的に引き抜くことにより、光ファイバー装置を分解して、光ファイバー６を取り出すことができる。この光ファイバー装置の分解は、後述する他の実施例においても行うことが可能である。 By forcibly pulling out the first collar member 3 from the second collar member 4 from the state of FIG. 4, the optical fiber device can be disassembled and the optical fiber 6 can be taken out. This disassembly of the optical fiber device can also be performed in other embodiments described later.
図７ならびに図８は実施例２に係る光ファイバー保持装置を説明するための図で、図７は光ファイバー保持装置の光ファイバー保持前の状態を示す切断正面図、図８は本実施例で用いられる第１管状弾性部材の一部拡大切断正面図である。 7 and 8 are diagrams for explaining the optical fiber holding device according to the second embodiment. FIG. 7 is a cut front view showing a state of the optical fiber holding device before holding the optical fiber, and FIG. 8 is a diagram used in this embodiment. It is a partially expanded cut front view of 1 tubular elastic member.
本実施例で前記実施例１と相違する点は、第１管状弾性部材１の構成である。前記実施例１では第１管状弾性部材１が１本の細い管状体（チューブ）から構成されているが、実施例２では第図８に示すように、管状弾性部材１の軸方向中間部から斜めに切断して、前側第１管状弾性部材半体（第１分割体）１ａと後側第１管状弾性部材半体（第２分割体）１ｂに分割されている。 The present embodiment is different from the first embodiment in the configuration of the first tubular elastic member 1. In the first embodiment, the first tubular elastic member 1 is composed of one thin tubular body (tube), but in the second embodiment, as shown in FIG. It is cut obliquely and divided into a front first tubular elastic member half (first divided body) 1a and a rear first tubular elastic member half (second divided body) 1b.
前側第１管状弾性部材半体１ａと後側第１管状弾性部材半体１ｂは、互いに相手側に向かう部分の片側が長く延びた傾斜面２７をもった片側延長部２９を有している。この片側延長部２９（傾斜面２７）どうしを互いに重ね合わせて、図７に示すように第２管状弾性部材２の第１管状弾性部材収納部１４内に収納する。 The front first tubular elastic member half 1a and the rear first tubular elastic member half 1b each have a one-side extension 29 having an inclined surface 27 that is long at one side of the part toward the other side. The one-side extension portions 29 (inclined surfaces 27) are overlapped with each other and stored in the first tubular elastic member storage portion 14 of the second tubular elastic member 2 as shown in FIG.
この収納で前側第１管状弾性部材半体１ａと後側第１管状弾性部材半体１ｂは第１管状弾性部材収納部１４の周壁で保持され、図８に示すように前側第１管状弾性部材半体１ａの傾斜面２７と後側第１管状弾性部材半体１ｂの傾斜面２７との間に隙間２８が形成される。 In this housing, the front first tubular elastic member half 1a and the rear first tubular elastic member half 1b are held by the peripheral wall of the first tubular elastic member housing 14, and as shown in FIG. 8, the front first tubular elastic member A gap 28 is formed between the inclined surface 27 of the half body 1a and the inclined surface 27 of the rear first tubular elastic member half body 1b.
また、前側第１管状弾性部材半体１ａと後側第１管状弾性部材半体１ｂの収納により、図７に示すように、第２管状弾性部材２に設けられている上側の第２弾性片部１６ａの折り曲げ開始部１７ａが前側第１管状弾性部材半体１ａの外周面と対向し、また、下側の第２弾性片部１６ｂの折り曲げ開始部１７ｂが後側第１管状弾性部材半体１ｂの外周面と対向する。 Further, as shown in FIG. 7, the upper second elastic piece provided on the second tubular elastic member 2 by housing the front first tubular elastic member half 1a and the rear first tubular elastic member half 1b. The bending start portion 17a of the portion 16a faces the outer peripheral surface of the front first tubular elastic member half 1a, and the bending start portion 17b of the lower second elastic piece 16b is the rear first tubular elastic member half. It faces the outer peripheral surface of 1b.
図９ならびに図１０は実施例３に係る光ファイバー保持装置を説明するための図で、図９は光ファイバー保持装置の光ファイバー保持前の状態を示す切断正面図、図１０は本実施例で用いられる第１管状弾性部材の一部拡大切断正面図である。 9 and 10 are diagrams for explaining the optical fiber holding device according to the third embodiment. FIG. 9 is a cut front view showing a state of the optical fiber holding device before holding the optical fiber, and FIG. 10 is a diagram used in this embodiment. It is a partially expanded cut front view of 1 tubular elastic member.
本実施例で前記実施例２と相違する点は、第１管状弾性部材１のカットの仕方である。即ち、実施例２では第１管状弾性部材１の中間部分を斜めにカットしたが、本実施例では第１管状弾性部材１の中間部分を、ファイバー挿入孔７を間にして階段状にカットして、前側第１管状弾性部材半体（第１分割体）１ｃと後側第１管状弾性部材半体（第２分割体）１ｄに分割されている。 The difference between the second embodiment and the second embodiment is the way of cutting the first tubular elastic member 1. That is, in the second embodiment, the intermediate portion of the first tubular elastic member 1 is cut obliquely, but in this embodiment, the intermediate portion of the first tubular elastic member 1 is cut stepwise with the fiber insertion hole 7 in between. The front first tubular elastic member half (first divided body) 1c and the rear first tubular elastic member half (second divided body) 1d are divided.
前側第１管状弾性部材半体１ｃと後側第１管状弾性部材半体１ｄは、互いに相手側に向かう部分の片側が長く延びた階段状の片側延長部２９を有している。この片側延長部２９どうしを互いに重ね合わせて、図９に示すように第２管状弾性部材２の第１管状弾性部材収納部１４内に収納する。 The front first tubular elastic member half 1c and the rear first tubular elastic member half 1d have a step-like one-side extension part 29 in which one side of the part toward the other side extends long. The one-side extension portions 29 are overlapped with each other and stored in the first tubular elastic member storage portion 14 of the second tubular elastic member 2 as shown in FIG.
この収納で前側第１管状弾性部材半体１ｃと後側第１管状弾性部材半体１ｄは第１管状弾性部材収納部１４の周壁で保持され、図１０に示すように前側第１管状弾性部材半体１ｃの階段部２９と後側第１管状弾性部材半体１ｄの階段部２９との間に隙間２８が形成される。 In this housing, the front first tubular elastic member half 1c and the rear first tubular elastic member half 1d are held by the peripheral wall of the first tubular elastic member housing 14, and as shown in FIG. 10, the front first tubular elastic member A gap 28 is formed between the stepped portion 29 of the half body 1c and the stepped portion 29 of the rear first tubular elastic member half body 1d.
この実施例２，３のように第１管状弾性部材１をそれの軸線方向と鎖交する方向にカットして、２つの第１管状弾性部材半体を得る方法は、隙間を有する第１管状弾性部材の製作が容易で、量産的である。 The method of obtaining the two first tubular elastic member halves by cutting the first tubular elastic member 1 in the direction crossing the axial direction thereof as in the second and third embodiments is the first tubular member having a gap. The elastic member can be easily manufactured and is mass-produced.
この実施例２，３における光ファイバー６の保持方法は、実施例１と同じであるから、重複する説明は省略する。 Since the holding method of the optical fiber 6 in the second and third embodiments is the same as that in the first embodiment, a duplicate description is omitted.
図１１ならびに図１２は実施例４に係る光ファイバー保持装置を説明するための図で、図１１は光ファイバー保持装置の光ファイバー保持前の状態を示す切断正面図、図１２は光ファイバー保持装置の光ファイバー保持後の状態を示す切断正面図である。 11 and 12 are diagrams for explaining the optical fiber holding device according to the fourth embodiment. FIG. 11 is a cut front view showing a state of the optical fiber holding device before holding the optical fiber, and FIG. It is the cutting | disconnection front view which shows this state.
本実施例で前記実施例１と相違する点は、第２管状弾性部材２と第２つば部材４の形状である。前記実施例１では図１に示すように、第１管状弾性部材１を第２管状弾性部材２の第１管状弾性部材収納部１４内に収納した状態では、第１管状弾性部材１の第１弾性片部９の開放端部と、第２管状弾性部材２の第２弾性片部１６の開放端部は略同じ位置にある。 The present embodiment is different from the first embodiment in the shapes of the second tubular elastic member 2 and the second collar member 4. In the first embodiment, as shown in FIG. 1, when the first tubular elastic member 1 is housed in the first tubular elastic member housing portion 14 of the second tubular elastic member 2, the first tubular elastic member 1 is first. The open end portion of the elastic piece portion 9 and the open end portion of the second elastic piece portion 16 of the second tubular elastic member 2 are at substantially the same position.
また、第２つば部材４の第２弾性部片収納部２１とジャケット保持部２２の間には、光ファイバー６は通すが、ジャケット２３は通さない隔壁３０が設けられていた。 Further, a partition wall 30 through which the optical fiber 6 passes but the jacket 23 does not pass is provided between the second elastic piece storage part 21 and the jacket holding part 22 of the second collar member 4.
この実施例４の場合、図１１に示すように、第１管状弾性部材１を第２管状弾性部材２の第１管状弾性部材収納部１４内に収納した状態で、第２管状弾性部材２の第２弾性片部１６の開放端部は第１管状弾性部材１の第１弾性片部９の開放端部より、光ファイバー６のジャケット２３側に延びている。 In the case of the fourth embodiment, as shown in FIG. 11, the first tubular elastic member 1 is accommodated in the first tubular elastic member accommodating portion 14 of the second tubular elastic member 2. The open end of the second elastic piece 16 extends from the open end of the first elastic piece 9 of the first tubular elastic member 1 toward the jacket 23 of the optical fiber 6.
さらに第２つば部材４には、第２弾性部片収納部２１とジャケット保持部２２の間に設けられた隔壁３０はなく、第２弾性部片収納部２１とジャケット保持部２２は直に連通している。 Further, the second collar member 4 does not have the partition wall 30 provided between the second elastic part storage part 21 and the jacket holding part 22, and the second elastic part storage part 21 and the jacket holding part 22 communicate directly. doing.
そのため、光ファイバー６とともにジャケット２３を光ファイバー保持装置の中に挿入した際、ジャケット２３の先端部は長く延びた第２弾性片部１６の開放端部の内側に入り込む設計になっている（図１１参照）。 Therefore, when the jacket 23 is inserted into the optical fiber holding device together with the optical fiber 6, the tip of the jacket 23 is designed to enter the inside of the open end portion of the second elastic piece 16 that extends long (see FIG. 11). ).
そして図１１に示すように、第１つば部材３の第１つば部１８を第２つば部材４の第２つば部２０側に向けて（矢印Ｚ方向）強制的に移動することにより、第１つば部材３の円筒状押圧部１９が末広がり状に屈曲している第２弾性片部１６の上に乗り上げる。 Then, as shown in FIG. 11, the first collar member 18 of the first collar member 3 is forcibly moved toward the second collar portion 20 side of the second collar member 4 (in the direction of arrow Z), thereby The cylindrical pressing portion 19 of the collar member 3 rides on the second elastic piece portion 16 bent in a divergent shape.
この円筒状押圧部１９の乗り上げにより、図１２に示すように第２弾性片部１６は径方向内側に押しすぼめられ、そのときの押圧力は主に第２弾性片部１６の折り曲げ開始部１７を中心として、第１管状弾性部材１の第１弾性片部９に作用して、局部的でなく、第１弾性片部９と対向している光ファイバー６の部分全体を上、下から弾性的に挟持（保持・固定）する。 As shown in FIG. 12, the second elastic piece portion 16 is squeezed radially inward by the climbing of the cylindrical pressing portion 19, and the pressing force at that time is mainly the bending start portion 17 of the second elastic piece portion 16. Acting on the first elastic piece portion 9 of the first tubular elastic member 1 as a center, and not locally, the entire portion of the optical fiber 6 facing the first elastic piece portion 9 is elastic from above and below. (Hold / fix).
それと同時に、第２弾性片部１６の径方向内側への押圧変形によりジャケット２３の先端部も上、下から弾性的に挟持（保持・固定）する。従ってこの実施例の場合、第２弾性片部１６の押圧変形により、光ファイバー６とジャケット２３の２個所をほぼ同時に固定することになる。 At the same time, the distal end portion of the jacket 23 is also elastically clamped (held / fixed) from above and below by the pressure deformation of the second elastic piece portion 16 inward in the radial direction. Therefore, in this embodiment, the two portions of the optical fiber 6 and the jacket 23 are fixed almost simultaneously by the pressing deformation of the second elastic piece portion 16.
図１３ならびに図１４は実施例５に係る光ファイバー保持装置を説明するための図で、図１３は光ファイバー保持装置の光ファイバー保持前の状態を示す切断正面図、図１４は光ファイバー保持装置の光ファイバー保持後の状態を示す切断正面図である。 13 and 14 are diagrams for explaining the optical fiber holding device according to the fifth embodiment. FIG. 13 is a cut front view showing a state of the optical fiber holding device before holding the optical fiber, and FIG. 14 is a view of the optical fiber holding device after holding the optical fiber. It is the cutting | disconnection front view which shows this state.
この実施例の場合、図６に示すようなファイバー挿入孔１３を有する第２管状弾性部材２は使用されておらず、その代わりに、ファイバー挿入孔１３（図１３参照）を有する例えばジルコニアなどからなるフェルール３１と、円筒部３２の図１３に向かって右側端から軸方向に沿って所定の長さのスリット状をした第２隙間１５を、中心軸を基準にして左右対称位置に２本形成し、それによって第２弾性片部１６が上下に２本設けられた第１つば部材３とで、実質的な第２管状弾性部材２の機能を果たしている。
フェルール３１の後端部は第１つば部材３の先端部に圧入されて、両者は一体となっている。
In the case of this embodiment, the second tubular elastic member 2 having the fiber insertion hole 13 as shown in FIG. 6 is not used, but instead, for example, from zirconia having the fiber insertion hole 13 (see FIG. 13). And two second gaps 15 in the form of slits having a predetermined length along the axial direction from the right end toward the FIG. 13 of the cylindrical portion 32 are formed at symmetrical positions with respect to the central axis. Thus, the first collar member 3 provided with two second elastic piece portions 16 on the top and bottom functions substantially as the second tubular elastic member 2.
The rear end portion of the ferrule 31 is press-fitted into the front end portion of the first collar member 3, and both are integrated.
また、本実施例の場合、第２つば部材４の第２弾性部片収納部２１の途中には、ジャケット収納部２２側に行くに従って徐々に縮径となった傾斜面を有する擂り鉢状の押しすぼめ部３３が形成されている。さらに、押しすぼめ部３３とジャケット収納部２２の間には、第１管状弾性部材１の外径と略同寸の内径を有する第１管状弾性部材保持部３４が設けられている。 Moreover, in the case of a present Example, in the middle of the 2nd elastic part piece accommodating part 21 of the 2nd collar member 4, it is a bowl-like shape which has the inclined surface which became gradually diameter-reduced as it went to the jacket accommodating part 22 side. A push-in part 33 is formed. Further, a first tubular elastic member holding portion 34 having an inner diameter substantially the same as the outer diameter of the first tubular elastic member 1 is provided between the push-in portion 33 and the jacket housing portion 22.
第１管状弾性部材１は図５に示す物と同じ形状をしており、前記第１管状弾性部材保持部３４に第１管状弾性部材１の基管部５が圧入され、第１管状弾性部材１の第１弾性片部９の開放端側が光ファイバー保持装置の先端側を向いた状態で、第１管状弾性部材１が第２つば部材４の内側に位置決め・保持される。 The first tubular elastic member 1 has the same shape as that shown in FIG. 5, and the base tubular portion 5 of the first tubular elastic member 1 is press-fitted into the first tubular elastic member holding portion 34, and the first tubular elastic member The first tubular elastic member 1 is positioned and held inside the second collar member 4 with the open end side of the first elastic piece portion 1 facing the front end side of the optical fiber holding device.
そして前述したフェルール３１と第１つば部材３の一体物を、図１３に示すように、第１つば部材３の第２弾性片部１６を先にして 第２つば部材４の弾性片部収納部２１内に挿入し、第２弾性片部１６の開放端が第２つば部材４の擂り鉢状押しすぼめ部３３の入口部に到達した所で、フェルール３１と第１つば部材３の一体物の挿入を停止する。 Then, as shown in FIG. 13, the ferrule 31 and the first collar member 3 are integrated into the elastic piece portion storage portion of the second collar member 4 with the second elastic piece portion 16 of the first collar member 3 first. 21, and when the open end of the second elastic piece 16 reaches the entrance of the bowl-shaped push-squeeze portion 33 of the second collar member 4, the integral of the ferrule 31 and the first collar member 3 Stop the insertion.
この状態で、図１３に示すように、第１管状弾性部材１の開放方向と第１つば部材３の開放方向は互いに反対向きになっており、第１つば部材３の第２弾性片部１６の折り曲げ開始部１７が、第１管状弾性部材１の第１弾性片部９の外周近傍にある。第２つば部材４の第２つば部２０に対して第１つば部材３の第１つば部１８に対して所定の間隔離れている。 In this state, as shown in FIG. 13, the opening direction of the first tubular elastic member 1 and the opening direction of the first collar member 3 are opposite to each other, and the second elastic piece portion 16 of the first collar member 3. The bending start portion 17 is in the vicinity of the outer periphery of the first elastic piece portion 9 of the first tubular elastic member 1. The second collar member 20 is separated from the second collar part 20 by a predetermined distance from the first collar part 18 of the first collar member 3.
光ファイバー６の先端部を、第２つば部材４のジャケット収納部２２から入れて、第１管状弾性部材１の光ファイバー挿入孔７を通し、フェルール３１の光ファイバー挿入孔１３を貫通させる。 The distal end portion of the optical fiber 6 is inserted from the jacket housing portion 22 of the second collar member 4, passes through the optical fiber insertion hole 7 of the first tubular elastic member 1, and penetrates the optical fiber insertion hole 13 of the ferrule 31.
そして第１つば部材３の第１つば部１８を第２つば部材４の第２つば部２０側に向けて（矢印Ｚ方向）強制的に移動することにより、第１つば部材３における第２弾性片部１６の開放端が第２つば部材４の押しすぼめ部３３の傾斜周面に沿って径方向内側に押しすぼめられる。 Then, by forcibly moving the first collar portion 18 of the first collar member 3 toward the second collar portion 20 side of the second collar member 4 (arrow Z direction), the second elasticity of the first collar member 3 is obtained. The open end of the piece portion 16 is squeezed radially inward along the inclined peripheral surface of the squeezed portion 33 of the second collar member 4.
そのときの押圧力は主に第２弾性片部１６の折り曲げ開始部１７を中心として、第１管状弾性部材１の第１弾性片部９に作用し、局部的でなく、第１弾性片部９と対向している光ファイバー６の部分全体を上、下から弾性的に挟持（保持・固定）することができる。この状態が、図１４に示されている。 The pressing force at that time mainly acts on the first elastic piece portion 9 of the first tubular elastic member 1 around the bending start portion 17 of the second elastic piece portion 16, and is not localized but the first elastic piece portion. 9 can be elastically clamped (held / fixed) from above and below. This state is shown in FIG.
図１５ならびに図１６は実施例６に係る光ファイバー保持装置を説明するための図で、図１５は光ファイバー保持装置の光ファイバー保持前の状態を示す切断正面図、図１６は光ファイバー保持装置が光ファイバーのジャケットを保持する状態を示す切断正面図である。 15 and 16 are diagrams for explaining the optical fiber holding device according to the sixth embodiment. FIG. 15 is a cut front view showing a state of the optical fiber holding device before holding the optical fiber, and FIG. It is a cutting | disconnection front view which shows the state holding.
図１３ならびに図１４に示した実施例５では光ファイバー６のジャケット２３を保持・固定する機能がなかったが、本実施例ではジャケット２３を保持・固定する機能を備えている。 In Example 5 shown in FIGS. 13 and 14, there was no function of holding and fixing the jacket 23 of the optical fiber 6, but in this example, a function of holding and fixing the jacket 23 is provided.
図１５に示すように、第２つば部材４の後端部に設けられたジャケット保持部２２の周壁には軸方向に延びた複数本の弾性を有するスリット３５が形成され、これによってジャケット保持部２２は複数の弾性を有する挟持片部となっている。 As shown in FIG. 15, a plurality of slits 35 having elasticity extending in the axial direction are formed on the peripheral wall of the jacket holding portion 22 provided at the rear end portion of the second collar member 4, thereby the jacket holding portion. Reference numeral 22 denotes a sandwiching piece having a plurality of elasticity.
このジャケット保持部２２の後端開口部には、略円筒状をした保持キャップ３６が外嵌されている。この保持キャップ３６の内周部には、前記ジャケット保持部２２の外径より徐々に小さくなった傾斜面を有する絞り部３７が形成されている。また、保持キャップ３６の後端部には、ジャケット２３の外径よりも若干大きい内径を有するジャケット挿通穴３８が設けられている。 A substantially cylindrical holding cap 36 is fitted on the rear end opening of the jacket holding portion 22. On the inner peripheral portion of the holding cap 36, a throttle portion 37 having an inclined surface that gradually becomes smaller than the outer diameter of the jacket holding portion 22 is formed. A jacket insertion hole 38 having an inner diameter slightly larger than the outer diameter of the jacket 23 is provided at the rear end portion of the holding cap 36.
光ファイバー６を光ファイバー保持装置に装着する前の状態では図１５に示すように、ジャケット保持部２２（挟持片部）の後端部は保持キャップ３６の絞り部３７を乗り越えていない状態である。 In a state before the optical fiber 6 is attached to the optical fiber holding device, as shown in FIG. 15, the rear end portion of the jacket holding portion 22 (clamping piece portion) is in a state where it does not get over the throttle portion 37 of the holding cap 36.
この状態で光ファイバー６を光ファイバー保持装置の内部に挿入し、ジャケット２３の先端部を保持キャップ３６のジャケット挿通穴３８を通して、第２つば部材４のジャケット保持部２２に挿入する（図面が煩雑になるため、図１５ならびに図１６では光ファイバー６とジャケット２３の表示を省略している）。 In this state, the optical fiber 6 is inserted into the optical fiber holding device, and the distal end portion of the jacket 23 is inserted into the jacket holding portion 22 of the second collar member 4 through the jacket insertion hole 38 of the holding cap 36 (the drawing becomes complicated). Therefore, the optical fiber 6 and the jacket 23 are not shown in FIGS. 15 and 16).
次に、保持キャップ３６を矢印で示すように第２つば部材４側に押し込む。この保持キャップ３６のスライドで図１６に示すように、ジャケット保持部２２（挟持片部）の後端部が相対的に絞り部３７の内側に入り込み、それによってジャケット保持部２２（挟持片部）が弾性的に径方向内側に押圧変形されて、ジャケット２３を複数本の挟持片部によって弾性的に保持・固定する。
なお、このジャケットの保持構造は、本発明の他の実施例において適用できる場合もある。
Next, the holding cap 36 is pushed into the second collar member 4 as indicated by an arrow. As shown in FIG. 16, the slide of the holding cap 36 causes the rear end portion of the jacket holding portion 22 (clamping piece portion) to relatively enter the inside of the throttle portion 37, whereby the jacket holding portion 22 (clamping piece portion). Is elastically pressed and deformed radially inward, and the jacket 23 is elastically held and fixed by the plurality of clamping pieces.
This jacket holding structure may be applicable in other embodiments of the present invention.
図１７ならびに図１８は実施例７に係る光ファイバー保持装置を説明するための図で、図１７は光ファイバー保持装置の光ファイバー保持前の状態を示す切断正面図、図１８は光ファイバー保持装置の光ファイバー保持後の状態を示す切断正面図である。 17 and 18 are diagrams for explaining the optical fiber holding device according to the seventh embodiment. FIG. 17 is a cut front view showing a state of the optical fiber holding device before holding the optical fiber, and FIG. It is the cutting | disconnection front view which shows this state.
本実施例では第１管状弾性部材１が外径１．２５ｍｍで長いフェルールの形をしており、中心軸にファイバー挿入孔７が貫通して設けられている。図１７に向かって約右半分には右側端から軸方向に沿って所定の長さのスリット状をした第１隙間８を、中心軸を基準にして左右対称位置に２本形成し、それによって途中が屈曲していないストレートに延びた第１弾性片部９が上下に２本設けられている。 In this embodiment, the first tubular elastic member 1 has a long ferrule shape with an outer diameter of 1.25 mm, and a fiber insertion hole 7 is provided through the central axis. In the right half of FIG. 17, two first gaps 8 having a slit shape with a predetermined length along the axial direction from the right end are formed at symmetrical positions with respect to the central axis. Two first elastic piece portions 9 extending vertically are provided in the upper and lower directions.
第２管状弾性部材２は図１７に向かって左側端から軸方向に沿って所定の長さのスリット状をした第２隙間１５を、中心軸を基準にして左右対称位置に２本形成し、それによって第２弾性片部１６が上下に２本設けられている。この第２弾性片部１６は途中位置に折り曲げ開始部１７があって、それを基点として第２弾性片部１６の開放端に向けて互いに離れる方向に向けて、略「く」の字状に屈曲されている。 The second tubular elastic member 2 is formed with two second gaps 15 in the shape of slits having a predetermined length along the axial direction from the left end toward the left side in FIG. Thereby, two second elastic piece portions 16 are provided on the upper and lower sides. The second elastic piece portion 16 has a folding start portion 17 in the middle position, and is formed in a substantially “<” shape in a direction away from each other toward the open end of the second elastic piece portion 16. It is bent.
この第２管状弾性部材２の先端角部には面取りによって傾斜面３９が形成され、この傾斜面３９の後方には第３つば部４０が突設されている。また、この第２管状弾性部材２の内側で、前記折り曲げ開始部１７から後方側には、第１管状弾性部材１の外径と略等しい内径を有する第１弾性部片収納部４１が形成されている。 An inclined surface 39 is formed by chamfering at the tip corner portion of the second tubular elastic member 2, and a third collar portion 40 is projected behind the inclined surface 39. In addition, a first elastic piece storage portion 41 having an inner diameter substantially equal to the outer diameter of the first tubular elastic member 1 is formed inside the second tubular elastic member 2 and on the rear side from the bending start portion 17. ing.
第１管状弾性部材１の先端部外周には押圧環状体４２がスライド可能に装着されており、押圧環状体４２の後端内周エッジ部４３は、図１７に示すように、光ファイバー保持装置が光ファイバー６を保持する前の状態では、第２管状弾性部材２の先端部に形成された傾斜面３９の下部と対向している。 A pressing annular body 42 is slidably mounted on the outer periphery of the distal end portion of the first tubular elastic member 1, and the inner peripheral edge 43 of the rear end of the pressing annular body 42 is formed by an optical fiber holding device as shown in FIG. In a state before the optical fiber 6 is held, it faces the lower portion of the inclined surface 39 formed at the tip of the second tubular elastic member 2.
また、この押圧環状体４２における後端内周エッジ部４３の内側には、図１８に示すように、第２管状弾性部材２の傾斜面３９を含む先端部を収納する先端収納部４４が形成されている。 Further, as shown in FIG. 18, a tip storage portion 44 that stores the tip portion including the inclined surface 39 of the second tubular elastic member 2 is formed inside the rear end inner peripheral edge portion 43 of the pressing annular body 42. Has been.
図１７の状態で光ファイバー６の先端部を第１管状弾性部材１のファイバー挿入孔７に通し、次に矢印で示すように押圧環状体４２を第２管状弾性部材２の第３つば部４０側に向けて強制的に移動することにより、押圧環状体４２の後端内周エッジ部４３が第２管状弾性部材２の傾斜面３９を乗り上げる。 In the state of FIG. 17, the tip of the optical fiber 6 is passed through the fiber insertion hole 7 of the first tubular elastic member 1, and then the pressing annular body 42 is moved to the third collar 40 side of the second tubular elastic member 2 as indicated by the arrow. Forcibly moving toward the end, the inner peripheral edge portion 43 of the pressing annular body 42 rides on the inclined surface 39 of the second tubular elastic member 2.
この乗り上げにより図１８に示すように、上、下の第２弾性片部１６は径方向内側に押しすぼめられ、そのときの押圧力は主に第２弾性片部１６の折り曲げ開始部１７を中心として、第１管状弾性部材１の第１弾性片部９に作用する。そして上、下の第１弾性片部９は第２弾性片部１６の押圧力を受けて、局部的でなく、第１弾性片部９と対向している光ファイバー６の部分全体を上、下から弾性的に挟持（保持・固定）することができる。 As shown in FIG. 18, the upper and lower second elastic piece portions 16 are squeezed radially inward by this riding, and the pressing force at that time is mainly centered on the bending start portion 17 of the second elastic piece portion 16. Acting on the first elastic piece 9 of the first tubular elastic member 1. The upper and lower first elastic piece portions 9 receive the pressing force of the second elastic piece portion 16 and are not localized, and the entire portion of the optical fiber 6 facing the first elastic piece portion 9 is not connected locally. Can be elastically clamped (held and fixed).
この押圧環状体４２の押し込みは、後端内周エッジ部４３が第２管状弾性部材２の第３つば部４０の根元部に当接した所で停止する（図１８）。 The pushing-in of the pressing annular body 42 stops when the rear end inner peripheral edge portion 43 comes into contact with the root portion of the third collar portion 40 of the second tubular elastic member 2 (FIG. 18).
図１９ならびに図２０は実施例８に係る光ファイバー保持装置を説明するための図で、図１９は光ファイバー保持装置の光ファイバー保持前の状態を示す切断正面図、図２０は光ファイバー保持装置の光ファイバー保持後の状態を示す切断正面図である。 19 and 20 are diagrams for explaining the optical fiber holding device according to the eighth embodiment. FIG. 19 is a cut front view showing a state of the optical fiber holding device before holding the optical fiber, and FIG. It is the cutting | disconnection front view which shows this state.
本実施例の場合、フェルール３１の内周部に第２管状弾性部材収納部４５が形成され、内側に第１管状弾性部材１を挿入した第２管状弾性部材２が収納される。フェルール３１の外周部には、円環状の溝４６が形成されている。 In the case of the present embodiment, the second tubular elastic member storage portion 45 is formed on the inner peripheral portion of the ferrule 31, and the second tubular elastic member 2 in which the first tubular elastic member 1 is inserted is stored inside. An annular groove 46 is formed on the outer periphery of the ferrule 31.
第１管状弾性部材１を第２管状弾性部材２内に挿入した状態で、第２管状弾性部材２の第２弾性片部１６の開放端部は第１管状弾性部材１の第１弾性片部９の開放端部より、光ファイバー６のジャケット２３側に延びている。 With the first tubular elastic member 1 inserted into the second tubular elastic member 2, the open end of the second elastic piece 16 of the second tubular elastic member 2 is the first elastic piece of the first tubular elastic member 1. 9 extends from the open end of the optical fiber 6 to the jacket 23 side.
第２つば部材４の第２つば部２０の内径はフェルール３１の外径と略等しく設計されており、組み立て時にフェルール３１の後端部がスライド可能に挿入される。 The inner diameter of the second collar portion 20 of the second collar member 4 is designed to be substantially equal to the outer diameter of the ferrule 31, and the rear end portion of the ferrule 31 is slidably inserted during assembly.
第２つば部材４の内周部の途中には、ジャケット収納部２２側に行くに従って徐々に縮径となった傾斜面を有する擂り鉢状の押しすぼめ部３３が形成されている。さらにこの押しすぼめ部３３の後端には、第２弾性片部１６の先端部を収納する先端収納部４７が形成されている。 In the middle of the inner peripheral portion of the second collar member 4, a bowl-shaped push-narrow portion 33 having an inclined surface that gradually decreases in diameter toward the jacket housing portion 22 side is formed. Further, a distal end storage portion 47 that stores the distal end portion of the second elastic piece portion 16 is formed at the rear end of the push-squeeze portion 33.
図１９に示すように、第１管状弾性部材１と第２管状弾性部材２を収納したフェルール３１の後端部を第２つば部材４の第２つば部２０内に挿入すると、第２弾性片部１６の後端部が押しすぼめ部３３の傾斜面に当接する。 As shown in FIG. 19, when the rear end portion of the ferrule 31 containing the first tubular elastic member 1 and the second tubular elastic member 2 is inserted into the second collar portion 20 of the second collar member 4, the second elastic piece The rear end portion of the portion 16 comes into contact with the inclined surface of the push-down portion 33.
この状態で、光ファイバー６の先端部を第２つば部材４のジャケット収納部２２から挿入し、第１管状弾性部材１の光ファンバー挿入孔を貫通して、フェルール３１の光ファンバー挿入孔を貫通させる。この状態が図１９に示めされている。 In this state, the tip end portion of the optical fiber 6 is inserted from the jacket housing portion 22 of the second collar member 4, passes through the optical fan bar insertion hole of the first tubular elastic member 1, and the optical fan bar insertion hole of the ferrule 31 is inserted. To penetrate. This state is shown in FIG.
次に第２つば部材４の第２つば部２０とフェルール３１の溝４６に治具を係合して（図示せず）、第２つば部材４とフェルール３１を互いに矢印方向に強制的に移動することにより、第２弾性片部１６の開放端が押しすぼめ部３３の傾斜周面に沿って径方向内側に押しすぼめられる。 Next, a jig is engaged with the second collar portion 20 of the second collar member 4 and the groove 46 of the ferrule 31 (not shown), and the second collar member 4 and the ferrule 31 are forcibly moved in the direction of the arrows. By doing so, the open end of the second elastic piece portion 16 is squeezed radially inward along the inclined circumferential surface of the squeezed portion 33.
そのときの押圧力は主に第２弾性片部１６の折り曲げ開始部１７を中心として、第１管状弾性部材１の第１弾性片部９に作用し、局部的でなく、第１弾性片部９と対向している光ファイバー６の部分全体を上、下から弾性的に挟持（保持・固定）することができる。 The pressing force at that time mainly acts on the first elastic piece portion 9 of the first tubular elastic member 1 around the bending start portion 17 of the second elastic piece portion 16, and is not localized but the first elastic piece portion. 9 can be elastically clamped (held / fixed) from above and below.
それと同時に、第２弾性片部１６の径方向内側への押圧変形によりジャケット２３の先端部も上、下から弾性的に挟持（保持・固定）する。従ってこの実施例の場合、第２弾性片部１６の押圧変形により、光ファイバー６とジャケット２３の２個所をほぼ同時に固定することになる。最終的には第２弾性片部１６の先端部が先端収納部４７内に収納される。この状態が図２０に示されている。 At the same time, the distal end portion of the jacket 23 is also elastically clamped (held / fixed) from above and below by the pressure deformation of the second elastic piece portion 16 inward in the radial direction. Therefore, in this embodiment, the two portions of the optical fiber 6 and the jacket 23 are fixed almost simultaneously by the pressing deformation of the second elastic piece portion 16. Finally, the distal end portion of the second elastic piece portion 16 is accommodated in the distal end accommodating portion 47. This state is shown in FIG.
図２１は実施例９に係る光ファイバー保持装置を説明するための図で、第１管状弾性部材１を第２管状弾性部材２内に挿入した状態での拡大後端面図である。 FIG. 21 is a diagram for explaining the optical fiber holding device according to the ninth embodiment, and is an enlarged rear end view of the first tubular elastic member 1 inserted into the second tubular elastic member 2.
前記実施例１では図３に示すように、第１管状弾性部材１の第１弾性片部９ならびに第２管状弾性部材２の第２弾性片部１６とも２分割されているが、図２１に示す実施例９では、第１管状弾性部材１の第１弾性片部９は３分割され、一方、第２管状弾性部材２の第２弾性片部１６は２分割されたものを使用している。 In the first embodiment, as shown in FIG. 3, the first elastic piece portion 9 of the first tubular elastic member 1 and the second elastic piece portion 16 of the second tubular elastic member 2 are divided into two parts. In the illustrated embodiment 9, the first elastic piece 9 of the first tubular elastic member 1 is divided into three parts, while the second elastic piece 16 of the second tubular elastic member 2 is divided into two parts. .
図２２は実施例１０に係る光ファイバー保持装置を説明するための図で、第１管状弾性部材１を第２管状弾性部材２内に挿入した状態での拡大後端面図である。 FIG. 22 is a diagram for explaining the optical fiber holding device according to the tenth embodiment, and is an enlarged rear end view of the first tubular elastic member 1 inserted into the second tubular elastic member 2.
図２２に示す実施例１０では、第１管状弾性部材１の第１弾性片部９は２分割され、一方、第２管状弾性部材２の第２弾性片部１６は３分割されたものを使用している。 In Example 10 shown in FIG. 22, the first elastic piece portion 9 of the first tubular elastic member 1 is divided into two parts, while the second elastic piece part 16 of the second tubular elastic member 2 is divided into three parts. doing.
１：第１管状弾性部材、
２：第２管状弾性部材、
３：第１つば部材、
４：第２つば部材、
６：光ファイバー、
７，１３：ファイバー挿入孔、
８：第１隙間、
９：第１弾性片部、
１４：第１管状弾性部材収納部、
１５：第２隙間、
１６：第２弾性部片、
１７：折り曲げ開始部、
２３：ジャケット、
２７：傾斜面、
２８：隙間、
２９：片側延長部、
Ｗ１：第１隙間の幅、
Ｄ１：光ファイバーの外径、
Ｗ２：第２隙間の幅、
Ｄ２：第１管状弾性部材の外径。
1: a first tubular elastic member,
2: Second tubular elastic member,
3: First collar member,
4: Second collar member,
6: Optical fiber,
7, 13: Fiber insertion hole,
8: First gap
9: 1st elastic piece part,
14: a first tubular elastic member housing,
15: second gap,
16: 2nd elastic part piece,
17: Bending start part,
23: Jacket,
27: inclined surface,
28: gap,
29: One side extension,
W1: width of the first gap,
D1: the outer diameter of the optical fiber,
W2: width of the second gap,
D2: outer diameter of the first tubular elastic member.
Claims (3)
一方の端面から軸方向内側に沿って前記第１管状弾性部材を収容する第１管状弾性部材収納部を形成し、その第１管状弾性部材収納部の周壁部の一方の端面から第１管状弾性部材収納部の途中まで延びた、前記第１管状弾性部材の外径（Ｄ２）より狭い幅（Ｗ２）の第２隙間（Ｄ２＞Ｗ２）が、中心軸を基準にしてほぼ対称位置に形成されて、複数の第２弾性片部を有する第２管状弾性部材２を備え、
前記第２弾性片部は、その長手方向の途中から前記一方の端面に行くに従って互いに離れるように屈曲しており、
前記第２管状弾性部材の第１管状弾性部材収納部に前記第１管状弾性部材を収容した状態で、前記第１管状弾性部材の第１弾性片部は前記第２弾性片部の折り曲げ開始部の内側にあり、
前記第２管状弾性部材の複数の第２弾性片部の先端部付近を径方向内側に向けて弾性変形することにより、第２弾性片部の折り曲げ開始部が、ストレートに延びた複数の第１弾性片部を径方向内側に押圧して、複数の第１弾性片部の内面により前記光ファイバーを弾性的に挟持することを特徴とする光ファイバー保持装置。 A first gap (D1> W1) having a fiber insertion hole slightly larger than the outer diameter of the optical fiber in the central axis and having a width (W1) narrower than the outer diameter (D1) of the optical fiber along the inner side in the axial direction from one end face. ) Is formed in a substantially symmetrical position with respect to the central axis, and has a first tubular elastic member having a plurality of first elastic piece portions extending straight.
A first tubular elastic member accommodating portion that accommodates the first tubular elastic member is formed along the axially inner side from one end surface, and the first tubular elastic member is formed from one end surface of the peripheral wall portion of the first tubular elastic member accommodating portion. A second gap (D2> W2) having a width (W2) narrower than the outer diameter (D2) of the first tubular elastic member extending to the middle of the member storage portion is formed at a substantially symmetrical position with respect to the central axis. A second tubular elastic member 2 having a plurality of second elastic pieces,
The second elastic piece portions are bent so as to be separated from each other as they go from the middle in the longitudinal direction to the one end surface,
In a state where the first tubular elastic member is accommodated in the first tubular elastic member accommodating portion of the second tubular elastic member, the first elastic piece portion of the first tubular elastic member is a bending start portion of the second elastic piece portion. Inside
By elastically deforming the vicinity of the tip end portions of the plurality of second elastic piece portions of the second tubular elastic member inward in the radial direction, the bending start portion of the second elastic piece portion is a plurality of first pieces extending straight. An optical fiber holding device, wherein the elastic piece portion is pressed radially inward to elastically hold the optical fiber by the inner surfaces of the plurality of first elastic piece portions.
前記第１管状弾性部材は軸方向に亘って第１分割体と第２分割体に分割され、前記第１分割体と第２分割体は互いに相手側に向かう部分の片側が長く延びた形状をしており、その長く延びた片側部分が互いに重なるようにして前記第１管状弾性部材が前記第２管状弾性部材の第１管状弾性部材収納部に収容されることを特徴とする光ファイバー保持装置。 The optical fiber holding device according to claim 1,
The first tubular elastic member is divided into a first divided body and a second divided body in the axial direction, and the first divided body and the second divided body have a shape in which one side of a portion facing each other extends long. An optical fiber holding device, wherein the first tubular elastic member is accommodated in the first tubular elastic member housing portion of the second tubular elastic member so that the long one side portions thereof overlap each other.
前記光ファイバーはジャケットで被覆されており、
前記第２管状弾性部材の第１管状弾性部材収納部に前記第１管状弾性部材を収容した状態で、前記第２弾性部片の後端部が前記第１弾性部片の後端部よりも前記ジャケット側に長く延びており、
前記第２弾性部片で第１弾性部片を径方向内側に押圧すると共に、前記第２弾性部片の後端部で前記ジャケットの先端部を弾性的に挟持することを特徴とする光ファイバー保持装置。 The optical fiber holding device according to claim 1 or 2,
The optical fiber is covered with a jacket,
In a state where the first tubular elastic member is housed in the first tubular elastic member housing portion of the second tubular elastic member, the rear end portion of the second elastic portion piece is more than the rear end portion of the first elastic portion piece. It extends long to the jacket side,
An optical fiber holder characterized in that the first elastic part piece is pressed radially inward by the second elastic part piece, and the front end part of the jacket is elastically held by the rear end part of the second elastic part piece. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013114169A JP2014232272A (en) | 2013-05-30 | 2013-05-30 | Optical fiber holder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013114169A JP2014232272A (en) | 2013-05-30 | 2013-05-30 | Optical fiber holder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2014232272A true JP2014232272A (en) | 2014-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2013114169A Pending JP2014232272A (en) | 2013-05-30 | 2013-05-30 | Optical fiber holder |
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| Country | Link |
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| JP (1) | JP2014232272A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6335007U (en) * | 1986-08-25 | 1988-03-07 | ||
| JP2633699B2 (en) * | 1989-04-13 | 1997-07-23 | 秀二 松本 | Linear light guide holding device |
| JPH11142687A (en) * | 1997-09-04 | 1999-05-28 | Furukawa Electric Co Ltd:The | Ferrule and optical connector |
| JP3068812B2 (en) * | 1998-07-27 | 2000-07-24 | 株式会社光研 | Linear light guide holding device |
| JP2005265975A (en) * | 2004-03-16 | 2005-09-29 | Fujikura Ltd | Optical connector |
| JP2005352274A (en) * | 2004-06-11 | 2005-12-22 | Sumitomo Electric Ind Ltd | Optical fiber connector member |
| JP2005352329A (en) * | 2004-06-14 | 2005-12-22 | Sanwa Denki Kogyo Co Ltd | Field assembly optical connector |
-
2013
- 2013-05-30 JP JP2013114169A patent/JP2014232272A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6335007U (en) * | 1986-08-25 | 1988-03-07 | ||
| JP2633699B2 (en) * | 1989-04-13 | 1997-07-23 | 秀二 松本 | Linear light guide holding device |
| JPH11142687A (en) * | 1997-09-04 | 1999-05-28 | Furukawa Electric Co Ltd:The | Ferrule and optical connector |
| JP3068812B2 (en) * | 1998-07-27 | 2000-07-24 | 株式会社光研 | Linear light guide holding device |
| JP2005265975A (en) * | 2004-03-16 | 2005-09-29 | Fujikura Ltd | Optical connector |
| JP2005352274A (en) * | 2004-06-11 | 2005-12-22 | Sumitomo Electric Ind Ltd | Optical fiber connector member |
| JP2005352329A (en) * | 2004-06-14 | 2005-12-22 | Sanwa Denki Kogyo Co Ltd | Field assembly optical connector |
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| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20141111 |