JP4372803B2 - Optical fiber connection method - Google Patents

Description

The present invention relates to an optical fiber connection method, and more particularly, to connect an existing optical fiber to an optical fiber connection component and a new optical fiber separate from the existing optical fiber by a connection mechanism of the optical fiber connection component. those concerning the connection methods of the effective light fiber.

In recent years, an optical fiber connector that can be easily attached to the tip of an optical fiber has been proposed with a ferrule having an optical fiber inserted into the center and a connection mechanism provided at the end of the ferrule. .
In this case, the connection mechanism includes a split connection element formed by combining two split halves, a clamp spring that is fitted on the outside of the connection element and biases the two split halves in a joining direction. One split half is divided into two parts, a main clamp and a sub clamp, and a centering groove is provided on the joint surface of the other split half with one split half. Yes.
And in order to attach the optical fiber connector of the above structure to the front-end | tip part of an optical fiber, for example, using the optical fiber connection tool which has a pair of opening-and-closing member, both opening-and-closing members are a main clamp and the other division | segmentation half part. And between the secondary clamp and the other split half, release the main clamp and secondary clamp to release the clamp state by both clamps, and connect the tip of the newly installed optical fiber via the secondary clamp It is inserted between the main clamp and the other divided half, and the tip of the new optical fiber is abutted and connected to the tip of the existing optical fiber inside the connection mechanism, specifically, inside the main clamp.

Then, in this state, both opening and closing members of the optical fiber connecting tool are simultaneously pulled out between the main clamp and the other split half and between the sub clamp and the other split half, and the existing optical fiber is newly installed by the main clamp. The optical fiber is clamped in a state where it is butt-connected, and the covered portion of the new optical fiber is clamped by the sub clamp.
In this way, the optical fiber connector can be attached to the tip of the new optical fiber, and the existing optical fiber on the optical fiber connector side and the new optical fiber can be held butt-connected. is there.
However, in the optical fiber connection tool as described above, when the tip of both optical fibers is bent due to the butt force of the new optical fiber against the existing optical fiber on the optical fiber connector side, it is bent. Both optical fibers are clamped as they are, and the loss due to bending of the optical fibers and the stress concentration on the bent ends of both optical fibers cause damage to the optical fiber tips, which causes the connection failure. May be.

The present invention has been made in view of the conventional problems as described above, and when attaching an optical fiber connector such as an optical fiber connector to the tip of the optical fiber, one or both of them are applied by the butt force between the optical fibers. Even if bending occurs at the tip of the optical fiber, the bending can be easily released, thereby preventing an increase in loss due to bending of the optical fiber and damage to the tip of the optical fiber, resulting in poor connection. it is an object to provide an optical fiber connection methods that inconvenience can be prevented, such as.

An optical fiber connection method according to claim 1 of the present invention is the first open / close member and the second open / close member for the ferrule with a connection mechanism in which the optical fiber protrudes from the rear end of the ferrule to which the optical fiber is inserted and fixed. The member is advanced, and the tip of the first opening / closing member is inserted and inserted between the first lid side element and the base side element of the connection element against the urging force of the clamp spring. The lid side element is opened, and the tip of the second opening / closing member is inserted so as to be interrupted between the second lid side element and the base side of the connection element against the urging force of the clamp spring. Open the lid-side element, insert the tip of the new optical fiber from the other end of the connection element along the alignment groove, and connect the tip of the new optical fiber to the tip of the ferrule-side optical fiber. , New optical fiber ferrule The first opening / closing member is pulled out from between the first lid side element and the base side element, and the first lid side element is closed by the urging force of a clamp spring. The tip of the optical fiber on the ferrule side and the tip of the newly installed optical fiber are clamped between the element and the base-side element, and the tips of both optical fibers are held in contact with each other. The opening / closing member is pulled out from between the second lid side element and the base side element, the second lid side element is closed by the urging force of the clamp spring, and the newly installed between the second lid side element and the base side element. The operation of clamping the covering portion of the optical fiber or pulling out the first opening / closing member from between the first lid side element and the base side element and closing the first lid side element by the biasing force of the clamp spring is completed. Before The opening / closing member is pulled out from between the second lid-side element and the base-side element, and the operation of closing the second lid-side element by the urging force of the clamp spring is started, and between the first lid-side element and the base-side element. And clamps the tip of the ferrule-side optical fiber and the tip of the new optical fiber so that the tips of both optical fibers are butt-connected and connected between the second lid-side element and the base-side element. The clamp of the newly installed optical fiber is clamped, and the tip ends of the first opening and closing member and the second opening and closing member are formed so as to gradually reduce the thickness toward the tip .

Optical fiber connection method according to claim 2 of the present invention is to provide an optical fiber connection method according to claim 1 of the present invention, the connecting mechanism, by combining the lid side element is divided into the two base side element And a clamp spring that is fitted on the outside of these connection elements and holds the base side element and the lid side element in a joined state, and constitutes one clamp part. And the lid-side element constituting the other clamp part are separate bodies, and the one opening / closing member can be inserted / removed between the lid-side element having the one clamp part and the base-side element, and the other the opening and closing member, characterized that you have become removably between lid side element and the base element forming the other clamping portion.

Optical fiber connection method according to claim 3 of the present invention is to provide an optical fiber connection method according to claim 1 of the present invention, the optical fiber of the newly established, bare optical fiber to the tip of the coating portion that is coated with a coating material In this new optical fiber, the bare optical fiber is butt-connected to the optical fiber inserted and fixed in the ferrule and clamped to the first clamp part, and the covering part is the first optical fiber. characterized Rukoto is clamped to the second clamp portion.

An optical fiber connection method according to a fourth aspect of the present invention is the optical fiber connection method according to the first aspect of the present invention, wherein the new optical fiber is butt-connected to the existing optical fiber, and then the new optical fiber is connected. Is pressed against the optical fiber inserted and fixed in the ferrule, the first clamp part is closed while ensuring a butt force between the optical fibers, the butt force is released, and the second clamp part is It closed and said Rukoto.

An optical fiber connection method according to claim 5 of the present invention includes: one clamp portion that clamps the vicinity of the butt connection portion of the butt-connected optical fiber to maintain the butt connection state; and Using an optical fiber connecting component having a connection mechanism having another clamp part for clamping a new optical fiber that is butt-connected to an existing optical fiber that is inserted in advance in the clamp part, and one of the connection mechanisms The clamp part clamps the existing optical fiber stored in the connection mechanism in advance and the new optical fiber separate from the existing optical fiber, and clamps the other optical part in the connection mechanism. When clamping the new optical fiber by inserting one open / close member that can be inserted into and removed from the one clamp part into one clamp part. Open one clamp part and insert the other opening / closing member that can be inserted into and removed from the other clamp part into the other clamp part to open the other clamp part. In this state, the existing optical fiber is opened. Insert the new optical fiber from the opposite side, connect the tip of the new optical fiber to the tip of the existing optical fiber, and in this state, pull out one open / close member from one clamp, In the state where the existing optical fiber and the new optical fiber are butt-connected with each other by the clamp part, the tips of these optical fibers are clamped, and then the other opening / closing member is pulled out from the other clamp part, and the other clamp part The new optical fiber is clamped by pulling one open / close member from one clamp part, and the existing optical fiber and the new optical fiber are pulled by one clamp part. In the state where the end of the optical fiber is clamped and connected, before the operation of clamping the tip of these optical fibers is completed, the other opening / closing member is pulled out from the other clamping part, and the operation of clamping the new optical fiber by the other clamping part is performed. Starting, the tip ends of the one and the other opening / closing members are formed so as to gradually reduce the thickness toward the tip .

According to the present invention, one open / close member is pulled out from one clamp part, and the one clamp part is closed and the existing optical fiber and the new optical fiber are butt-connected and clamped. After that, the other opening / closing member is pulled out from the other clamp part, and the other clamp part is closed to clamp the new optical fiber. In this way, the existing optical fiber and the new optical fiber can be connected without causing bending.
Therefore, even if the leading ends of both optical fibers are bent due to the butt force of the new optical fiber with respect to the existing optical fiber, the bending can be released in the direction of the new optical fiber before closing the other clamp portions. Therefore, the tips of both optical fibers are not clamped in a bent state, and the loss due to bending of the optical fibers is increased or the stress concentrates on the tips of both optical fibers and breaks. No connection failure can be eliminated, and reliability can be greatly improved.

Hereinafter, the present invention will be described with reference to the accompanying drawings in order to describe the present invention in more detail.
Hereinafter, embodiments of the present invention shown in the drawings will be described.
FIGS. 1 to 15 show a first embodiment of an optical fiber connection tool according to the present invention. This optical fiber connection tool 1 is used when attaching an optical fiber connection component to the tip of an optical fiber. As shown in FIGS. 1A and 1B, the base 101 for fixing the optical fiber connecting component 5 and the two opening / closing members 2 provided on the base 101 can be effectively applied. 3 are provided.

The optical fiber connection tool 1 according to the present invention can be applied to various types of optical fiber connection components 5.
The optical fiber connecting component 5 shown in FIGS. 2 to 4 (hereinafter, this optical fiber connecting component may be described with reference numeral 501) is, for example, an SC-type light established in JIS C 5973 or the like. A connecting mechanism 10 (see FIGS. 4 and 5) in which a ferrule 7 of a connector (SC: Single fiber Coupling optical connector) is housed in a housing 502 and is assembled on the rear end side facing the joining end face 8 at the front end of the ferrule 7. ) Is housed and incorporated in a sleeve-like stop ring 503 connected to the housing 502. Hereinafter, this optical fiber connecting component is referred to as an “optical fiber connector” and may be described with reference numeral 501. The connection mechanism 10 has a structure assembled to the rear end of the ferrule 7, and the ferrule 7 and the connection mechanism 10 are integrally formed inside the housing 502 and the stop ring 503 of the optical fiber connector 501 as a ferrule 7A with a connection mechanism. Stored. Further, as shown in FIG. 3, the optical fiber connector 501 is attached to and detached from a female connector housing such as an optical connector adapter in the same manner as the SC optical fiber connector by attaching a knob 508 to the outside of the housing 502. It can be connected as possible.

3 and 4, the housing 502 and the stop ring 503 are both sleeve-shaped members, and the ferrule 7 of the ferrule 7 </ b> A with a connection mechanism is accommodated in the housing 502. The connection mechanism 10 of the ferrule 7A with the connection mechanism is housed in a stop ring 503 that is assembled by engaging with the rear end side (right side in FIGS. 3 and 4) of the housing 502.
3 and 4, the spring denoted by reference numeral 504 takes a reaction force against the stop ring 503 so that the ferrule 7A with the connection mechanism is moved in the direction of the joint end face 8, that is, the entire ferrule 7A with the connection mechanism is The urging is performed in the direction of pushing from the front end side (left side in FIGS. 3 and 4). However, in the ferrule 7A with a connection mechanism, when the flange portion 9 of the ferrule 7 abuts against a stopper wall 505 that is a small protrusion protruding inside the housing 502, the further movement toward the distal end side of the housing 502 is prevented. Be regulated. Reference numeral 506 denotes a boot.

 The optical fiber connection tool 1 drives the opening and closing members 2 and 3 while storing and holding the optical fiber connection component 5 in the component storage groove 103 formed in a shape recessed from the upper surface 102 of the base 101. By pushing the opening / closing members 2 and 3 into the optical fiber connection component 5, the optical fiber can be inserted into the optical fiber connection component 5. The optical fiber is clamped and held by the function of the optical fiber connection component 5 by pulling out the opening and closing members 2 and 3 from the optical fiber connection component 5 after the completion of the connection work between the optical fibers in the optical fiber connection component 5. Thus, the connection state between the optical fibers is maintained.

  The component storage groove 103 has a function of stably supporting the optical fiber connection component 5 so that the optical fiber connection component 5 does not wobble due to the inner surface shape. The base 101 corresponds to the shape of the optical fiber connection component 5, The one having the component storage groove 103 having a shape capable of realizing stable support of the fiber connection component 5 is employed. Further, in FIGS. 1A and 1B, a grooved block 104 in which a component storage groove 103 is formed is attached to the base 101 in a replaceable manner. The component housing groove 103 corresponding to the shape of the optical fiber connecting component 5 can be provided in the base 101. For example, the ferrule 7A with a connection mechanism described above can be used alone as an optical fiber connecting part. When the ferrule 7A with a connection mechanism is installed on the base 101, the ferrule 7A with a connection mechanism is used. The base 101 (or the grooved block 104) having the component storage groove 103 having a shape capable of stably supporting the above is adopted. The component storage groove 103 has a structure capable of storing and removing the optical fiber connection component 5 from the base 101. The base is not necessarily limited to a configuration having a replaceable grooved block, and a structure in which a component storage groove is directly formed on the base may be employed.

The ferrule 7A with the connection mechanism of the optical fiber connector 501 will be specifically described.
As shown in FIGS. 4 and 5, an optical fiber 6 (bare optical fiber) is inserted (fixed) at the center of the ferrule 7. In this case, one end of the optical fiber 6 is formed flush with the joining end face 8 of the ferrule 7 by polishing, and the other end protrudes from the end face 9a on the rear end side of the ferrule 7 by a predetermined length. The ferrule 7 functions as an optical fiber fixing part.
The connection mechanism 10 includes a connection element 11 formed of plastic or the like, and a clamp spring 16 formed of metal or the like fitted on the outside of the connection element 11.

  The connecting element 11 has a split structure in which an elongated base-side element 12 extending from the rear end of the ferrule 7 and a lid-side element 13 that is a chip-like piece are combined. One end of the ferrule 7 is integrally connected and fixed to the flange portion 9 of the ferrule 7. The lid side element 13 is divided in the axial direction into a first lid side element 14 that is one lid side element and a second lid side element 15 that is the other lid side element. The elements 14 are arranged so as to be closer to the ferrule 7 than the second lid side element 15 and are arranged so as to overlap the base side element 12. As shown in FIG. 5B, an optical fiber 17 (in this embodiment) is connected to the optical fiber 6 on the ferrule 7 side on the surface facing the base side element 12 of the first lid side element 14. The optical fiber 17 is an optical fiber core. Specifically, the optical fiber 17a, which is a bare optical fiber exposed at the tip of the optical fiber 17, is connected to the ferrule-side optical fiber 6). A centering groove 12a is provided. The alignment groove 12a is a V-groove in this embodiment, but a U-groove, a round groove (a groove having a semicircular cross section), or the like can also be employed. Further, as shown in FIG. 5, the rear surface of the connection mechanism 10 is provided on the surface of the second lid-side element 15 facing the base-side element 12 and the surface of the base-side element 12 facing the second lid-side element 15. Covering storage grooves 12b and 12c are formed to store the optical fiber 17 (specifically, the covering portion where the optical fiber 17a is not exposed) inserted into the connection mechanism 10 from the side (the back right side of FIG. 5 and the right side of FIG. 4). ing. In the connection mechanism 10, the covering housing grooves 12 b and 12 c are grooves formed by expanding the alignment groove 12 a, and have a corresponding positional relationship between the base side element 12 and the second lid side element 15. In addition, in a state where the connection element 11 is closed (a state where the lid side element 13 is joined to the base side element 12), each communicates with the alignment groove 12a. These covering housing grooves 12b and 12c align the optical fiber 17a (bare optical fiber) at the tip of the optical fiber 17 inserted into the connection mechanism 10 from the rear end side of the connection mechanism 10 (right back in FIG. 5, right side in FIG. 4). It also functions as an invitation groove leading to the groove 12a. However, the cross-sectional shape of the covering and storing grooves 12b and 12c is not necessarily the same as that of the aligning groove 12a.

  The alignment groove may be formed on either the base side element 12 or the first lid side element 14 or on both sides. Further, the covering and storing groove may be formed only on one side of the base side element and the lid side element.

  A clamp spring 16 having a U-shaped cross section is fitted on the outside of the base side element 12 and the lid side element 13 of the connecting element 11, and the base side element 12 and the lid side element 13 are joined by the urging force of the clamp spring 16. It is supposed to be kept in the state. A joint portion between the base side element 12 and the lid side element 13 is positioned in the opening of the clamp spring 16. A notch 16a is formed at the center in the longitudinal direction of the clamp spring 16 so as to be cut from the opening end surface to a predetermined position. The first lid side element 14 is a base side element at the clamp spring 16 on the left side of the notch 16a. The second lid side element 15 is biased in the direction of the base side element 12 in the right side portion.

As described later, the lid-side element 13 is a portion for clamping a connection portion where the optical fibers 6 and 17 are butt-connected (in other words, a portion where an alignment groove is formed. One clamp described later) Portion) and a portion for accommodating and clamping the covering portion of the optical fiber 17 (in other words, a portion in which a covering receiving groove is formed; other clamping portion described later) Any structure that can be opened and closed separately by insertion and extraction is acceptable. In this respect, the structure is not necessarily limited to a separate structure, and an integrated structure can also be adopted. In the case of being integrated, for example, a configuration in which separate opening and closing is realized by deformation of the lid side element can be employed. Further, as a clamp spring, for the same reason, it is only necessary that the two clamps can be opened and closed separately, and it is not always necessary to employ one having a notch.
The shape of the clamp spring is not limited to a U-shaped cross section, and may be a C-shaped cross section, for example.

  The first lid side element 14, the corresponding part of the base side element 12, and the left side part of the clamp spring 16 fitted on the outside thereof constitute a first clamp part 18, which is one clamp part, The second clamp part 19 which is another clamp part is configured by the two lid side elements 15, the corresponding part of the base side element 12 and the right side part of the clamp spring 16 fitted on the outside thereof. It has become.

As shown in FIG. 1, the optical fiber connection tool 1 is provided on the base 101 for fixing the optical fiber connector 5, and can be advanced and retracted in the direction of the optical fiber connector 5 fixed to the base 101. The first opening / closing member 2 as one opening / closing member and the second opening / closing member 3 as the other opening / closing member are provided, and both the opening / closing members 2 and 3 can be operated independently.
As shown in FIGS. 3 and 4, the distal ends of the first opening and closing member 2 and the second opening and closing member 3 are each formed in a wedge shape, and the distal ends of the first opening and closing member 2 are the first lid side element 14 and the base side. The tip of the second opening / closing member 3 can be inserted / removed between the element 12 and the second lid side element 15 and the base side element 12.
The first opening / closing member 2 and the second opening / closing member 3 are attached to a drive mechanism (not shown), and advance and retract independently in the direction of the optical fiber connector 5 on the base 101 by the operation of the drive mechanism. Yes. In this case, the drive mechanism may be operated manually or may be automatically operated using power.

  The optical fiber connection tool 1 illustrated in FIGS. 1A and 1B has a structure in which the opening and closing members 2 and 3 are manually operated. The opening and closing members 2 and 3 are elongated members. As shown in FIG. 1, the opening and closing members 2 and 3 are provided in a guide groove 106 secured between the base 101 and a pressing plate 105 attached on the base 101. The central part in the longitudinal direction is accommodated. The opening / closing members 2 and 3 can move forward and backward with respect to the component storage groove 103 by sliding with respect to the base 101 and the holding plate 105 by sliding with the inner surface of the guide groove 106. However, the opening / closing members 2 and 3 are prevented from being displaced in directions other than the advancing / retreating direction with respect to the component housing groove 103 due to the formation accuracy of the inner surface of the guide groove 106. The wedge-shaped portions at the distal ends of the opening and closing members 2 and 3 are arranged so as to be closer to the component storage groove 103 than the guide groove 106, but the retracting operation of the opening and closing members 2 and 3 (moving away from the component storage groove). Therefore, the guide groove 106 may be drawn into the guide groove 106.

  The front ends of the opening and closing members 2 and 3 protruding from the guide groove 106 to the side opposite to the component storage groove 103 are portions that function as a handle for manually operating the opening and closing members 2 and 3. It is attached. Further, the window 108 formed on the holding plate 105 is for visually confirming a mark (not shown) formed on the opening and closing members 2 and 3 by coloring, unevenness or the like from the outside of the optical fiber connecting tool 1. In this embodiment, when the mark is visible from the window 108, the ends of the opening / closing members 2 and 3 are projected to the storage position of the optical fiber connection component 5 in the component storage groove 103, and the optical fiber connection component 5 with respect to the component storage groove 103. Open / close member 2 in the direction of retreating from the component storage groove 103 (left side in FIGS. 1A and 1B). The window 108 and the mark function so as to indicate that the optical fiber connection component 5 can be stored and taken out from the component storage groove 103 when the mark 3 becomes invisible by the movement of 3. The function of the mark visible from 108 is not limited to this. For example, when the mark is not visible, the optical fiber connection component 5 can be stored and removed from the component storage groove 103. The illustrated, housed when the mark is visible, may function to indicate the prohibition of extraction operations.

  In the guide groove, for example, by a protrusion protruding from the pressing plate 105, a protrusion protruding from the base 101, etc., the opening / closing members 2 and 3 are moved forward in the component storage groove (pushing direction). A stopper (not shown) for setting a movement limit is provided. Further, the stopper as described above is formed on the grooved block, and the movement limit in the forward direction of the opening and closing members 2 and 3 is set in accordance with the structure of the optical fiber connecting component housed in the grooved block. Thus, it is also possible to employ a configuration in which the optical fiber connecting component is not damaged by excessive pressing of the opening / closing members 2 and 3.

  In order to attach the optical fiber connector 501 to the tip of the newly installed optical fiber 17 using the optical fiber connection tool 1 according to the present embodiment configured as described above, first, as shown in FIGS. (However, in FIGS. 6 to 12, the housing of the optical fiber connector and the stop ring are not shown, and the relationship between the ferrule 7A with a connection mechanism and the opening and closing members 2 and 3 is clearly shown). First, the first opening / closing member 2 and the second opening / closing member 3 are advanced in the direction of the optical fiber connector 501 to fix the optical fiber connector 501 to the base 101 (see FIGS. 1A and 1B). It is inserted into wedge insertion holes 507a and 507b (see FIG. 3) opened on the side of the ring 503, and the tip of the first opening / closing member 2 is inserted into the clamp spring 16 from the wedge insertion hole 507a. The first lid side element 14 is opened by being inserted between the first lid side element 14 and the base side element 12 of the connection element 11 against the urging force, and the tip of the second opening / closing member 3 is opened. Is inserted through the wedge insertion hole 507b so as to be interrupted between the second lid side element 15 and the base side element 12 against the urging force of the clamp spring 16, and the second lid side element 15 is opened. (See FIG. 9). 9 shows a state in which the other clamp portion 19 is opened by inserting the opening / closing member 3, but it goes without saying that the opening of the one clamping portion 18 by insertion of the opening / closing member 2 is the same as that in FIG. There is no.

  And the front-end | tip part of the new optical fiber 17 is inserted along the alignment groove | channel 12a from the other end side (rear end side) of the connection element 11, and the front-end | tip of the new optical fiber 17 is made into the front-end | tip of the existing optical fiber 6. Make a butt connection. The optical fiber 6 on the ferrule 7 side is inserted and fixed in advance through a fine hole passing through the ferrule 7 along the central axis of the ferrule 7, and the leading end protruding from the rear end of the ferrule 7 extends from one end side of the connection element 11. Specifically, the new optical fiber 17 inserted between the base side element 12 and the first lid side element 13 of the connection element 11 is an optical fiber protruding from the rear end of the ferrule to the connection mechanism 10. 6, an optical fiber 17a at the tip (bare optical fiber in this case) is butt-connected. In addition, the optical fibers 6 and 17a are brought into contact with each other at the center portion in the longitudinal direction of the alignment groove 12a, and the connection is realized in a state in which the alignment grooves 12a are precisely positioned and aligned with each other. The alignment state between the optical fibers 6 and 17a is continued even after the connection element 11 of the connection mechanism 10 is closed (described later).

  Then, as shown in FIG. 11, the drive mechanism is operated while maintaining the butting force between the optical fibers 6 and 17a by pressing the new optical fiber 17 in the direction of the existing optical fiber 6 with a predetermined force. The first opening / closing member 2 is pulled out from between the first lid side element 14 and the base side element 12, the first lid side element 14 is closed by the biasing force of the clamp spring 16, and the first lid side element 14 and the base side element 12 are closed. The tip of the existing optical fiber 6 and the tip of the new optical fiber 17 are clamped between the two, and the tips of both optical fibers 6 and 17 are held in contact with each other. However, when the optical fibers 6 and 17 are sufficiently connected to each other without the optical fibers 6 and 17a being brought into contact with each other by the refractive index matching agent or the like injected into the connection mechanism 10 (the refractive index matching agent Depending on the function, optical connection may be possible even if a minute gap is interposed between the optical fibers 6 and 17). There is no need to keep it, and one clamping part may be closed in a state where no butting force is applied. Even in this case, by closing one clamp part and then closing the other clamp part, it is possible to easily and reliably prevent unnecessary bending and bending stress on the optical fiber. The optical characteristics of the optical fiber) can be maintained stably, and the reliability of the connection between the optical fibers can be improved. This also applies to the connection between optical fibers in the connection mechanism (especially in one clamp portion) in other embodiments of the present invention.

Next, as shown in FIG. 12, the drive mechanism is operated to pull out the second opening / closing member 3 from between the second lid side element 15 and the base side element 12, and the second lid side is urged by the urging force of the clamp spring 16. The element 15 is closed, and the other covering portion 19, that is, the covering portion of the newly installed optical fiber 17 is clamped between the second lid side element 15 and the base side element 12. When closing the other clamp part 19, before the optical fiber 17 is clamped by the clamp part 19, the butting force (pressing force) of the optical fiber 17 with respect to the optical fiber 6 is released. This is also true in other embodiments of the present invention when closing one clamp part and then closing the other clamp part.
In this way, the optical fiber connector 5 can be attached to the tip of the new optical fiber 17, and the existing optical fiber 6 of the optical fiber connector 5 and the new optical fiber 17 are held in a butt-connected state. Can do.

In the optical fiber connecting tool 1 and the optical fiber connecting method according to this embodiment configured as described above, the first opening / closing member 2 and the second opening / closing member 3 are independently operated, and the first opening / closing member 2 is operated. After the first lid side element 14 is closed by pulling out, the second opening / closing member 3 is pulled out and the second lid side element 15 is closed, so that a new optical fiber 17 is attached to the tip of the existing optical fiber 6. Even if the optical fiber 6 is bent at the distal end portion of the optical fiber 17 or at the distal end portions of the optical fibers 6 and 17 due to the butting force between the optical fibers, the first lid-side element 14 is moved. Since the second lid side element 15 is still in the open state when it is closed, the deflection can be released in the direction of the newly installed optical fiber 17, and the second lid side after the deflection is completely (or almost) removed. Close element 15 It becomes door.
Therefore, both optical fibers 6 and 17 are clamped in a state in which the distal ends of both optical fibers 6 and 17 are bent, and an increase in loss due to bending of the optical fibers 6 and 17 and the distal ends of both optical fibers 6 and 17 are obtained. The stress is not concentrated on the portion and it is not damaged, connection failure can be eliminated, and the reliability can be greatly improved.

  Furthermore, since the first opening / closing member 2 and the second opening / closing member 3 can be designed separately, the cost can be reduced. That is, the open / close members 2 and 3 are designed in accordance with each of the one clamp part and the other clamp part (for example, the size of the opening of the first lid side element 14 of the first clamp part 18). Are different from the size of the opening of the second lid-side element 15 of the second clamp part 19), both of which are parts that require high machining accuracy corresponding to the design of the clamp part to be applied. . If a wedge-shaped projection inserted into and removed from the first clamp portion 18 and a wedge-shaped projection inserted into and removed from the second clamp portion 19 are formed in one component, precision machining is performed at a plurality of locations in one component. In addition, it is necessary to ensure the positional relationship between the wedge-shaped projections precisely, so it is difficult to ensure accuracy, labor is required for processing, and cost reduction is difficult. By making the first opening / closing member 2 and the second opening / closing member 3 different from each other, the manufacturing becomes easy and the cost can be reduced.

  In the above embodiment, the optical fiber connection tool according to the present invention is applied to the single-core optical fiber connector 5. However, although not shown, the optical fiber connection tool according to the present invention is applied to a multi-fiber optical fiber connector. Of course, even if applied, the same effects can be obtained. Moreover, in this embodiment, although the thing provided with two clamp parts was made into object, it is applicable also to the thing provided with two or more clamp parts.

  Examples of the optical fiber connection component 5 to which the present invention can be applied are not limited to the optical fiber connector 501 described above. For example, the ferrule 71A with a connection mechanism shown in FIGS. 13 (a) to 13 (c) and FIG. Various configurations such as a mechanical splice (optical fiber connection component 20) shown in FIGS. 16 to 18 can be employed.

  The ferrule 71A with a connection mechanism is built in the housing 511 of the optical fiber connector 510 shown in FIG. The optical fiber connector 510 is a so-called MTRJ type optical connector, and a latch 512 that is detachably engaged with a connector housing such as an optical connector adapter is provided on the outside of the housing 511 so as to protrude from the connector housing. When inserted, the connection state is maintained by the engagement of the latch, and the engagement with the connector housing can be easily released by the operation of the latch 512.

  A ferrule 71A with a connection mechanism shown in FIGS. 13A to 13C and FIG. 14 is obtained by assembling the connection mechanism 110 on the rear end side facing the joining end surface 81 side (front end side) of the ferrule 71. is there. The ferrule 71 is a so-called MT type optical connector (established in JIS C 5981, issued by IEC 1754-5, etc. MT: Mechanically Transferable), and is made of plastic. A plurality of (two in the illustrated example) optical fibers 61 are inserted into and fixed to the ferrule 71, and the tips of the optical fibers 61 are exposed at the joining end surface 81. The ferrule 71 functions as an optical fiber fixing part.

The connection mechanism 110 includes a connection element 111 formed of plastic or the like provided on the rear end side of the ferrule 71 and a clamp spring 116 formed of metal or the like fitted on the outside of the connection element 111.
The connection element 111 has a split structure in which an elongated base-side element 112 extending from the rear end of the ferrule 71 and a lid-side element 113 that is a chip-shaped piece are combined. One end is integrally connected and fixed to the rear end of the ferrule 71. The lid side element 113 is divided into two in the axial direction: a first lid side element 114 that is one lid side element and a second lid side element 115 that is the other lid side element. Each ferrule side optical fiber 61 has a protruding portion protruding from the rear end portion of the ferrule 71, and this protruding portion is disposed between the base side element 112 and the first lid side element 114. . As shown in FIG. 14, the optical fiber 61 on the ferrule 71 side and the optical fiber 171 (but this optical fiber 61) that is butt-connected to the optical fiber 61 are disposed on the surface of the base side element 112 facing the first lid side element 114. In the embodiment, the optical fiber 171 is a single-core optical fiber, and more specifically, an optical fiber 171a that is a bare optical fiber exposed at the tip of the optical fiber 171 is connected to the ferrule-side optical fiber 61. Two alignment grooves 112a for aligning and aligning with high accuracy are provided in parallel. The alignment groove 112a is a V-groove in this embodiment, but a U-groove, a round groove (a groove having a semicircular cross section), or the like can also be employed. Further, the rear surface of the connection mechanism 110 (see FIG. 13A) is provided on the surface of the second lid side element 115 facing the base side element 112 and the surface of the base side element 112 facing the second lid side element 115. , (B) coating housing grooves 112b and 112c (see FIG. 13C) for housing the optical fiber 171 (in detail, the coating portion where the optical fiber 17a is not exposed) inserted into the connection mechanism 110 from the right side). Is formed. In the connection mechanism 110, the covering housing grooves 112b and 112c form a hole having a rectangular cross section when the space between the base side element 112 and the second lid side element 115 is closed. When the space between the base-side element 112 and the second lid-side element 115 is closed, the covering housing grooves 112b and 112c can clamp a so-called optical fiber tape core wire and can stably hold the optical fiber tape without looseness. ing. In addition, a plurality of guide grooves 112d continuous from the alignment groove 112a are formed in parallel at the bottom of the covering housing groove 112c of the base side element 112. The guiding groove 112d fulfills the function of guiding the optical fiber 171a (bare optical fiber) at the tip of the optical fiber 171 inserted into the connection mechanism 110 from the rear end side of the connection mechanism 110 to the alignment groove 112a. However, the sectional shape of the guiding groove 112d is not necessarily the same as that of the aligning groove 112a.
The alignment groove may be formed on either the base side element 112 or the first lid side element 114, or on both sides.

A clamp spring 116 having a U-shaped cross section is fitted on the outside of the base side element 112 and the lid side element 113 of the connection element 111, and the base side element 112 and the lid side element 113 are joined by the urging force of the clamp spring 116. It is supposed to be kept in the state. A joint portion between the base side element 112 and the lid side element 113 is positioned in the opening of the clamp spring 116. A notch 116a that is cut from the opening end surface to a predetermined position is provided at the center in the longitudinal direction of the clamp spring 116, and the first lid side element 114 is the base side element at the clamp spring 116 on the left side of the notch 116a. The second lid side element 115 is biased in the direction of the base side element 112 in the right side portion.
In addition, as the lid side element 113, as will be described later, a portion for clamping a connection portion where the optical fibers 61 and 171 are abutted and connected to each other (in other words, a portion where an alignment groove is formed), and an optical fiber 171. The portion that accommodates and clamps the covering portion (in other words, the portion in which the covering housing groove is formed) is opened and closed separately by inserting and removing (inserting and extracting) the two opening and closing members 2 and 3. Any structure may be used, and in this respect, the structure is not necessarily limited to a separate structure, and an integrated structure may be employed. In the case of being integrated, for example, a configuration in which separate opening and closing is realized by deformation of the lid side element can be employed. Further, as a clamp spring, for the same reason, it is only necessary that the two clamps can be opened and closed separately, and it is not always necessary to employ one having a notch.

The shape of the clamp spring is not limited to a U-shaped cross section, and may be a C-shaped cross section, for example.
The first lid side element 114 disposed on the ferrule 71 side with respect to the second lid side element 115, the portion of the base side element 112 corresponding to the first lid side element 114, and the left side portion of the clamp spring 116 fitted on the outside thereof. The first clamp part 118, which is a clamp part of the second side, is constituted by the second lid side element 115, the part of the base side element 112 corresponding thereto, and the right side part of the clamp spring 116 fitted on the outside thereof. The 2nd clamp part 119 which is a clamp part is comprised. Also for the optical fiber connection component 71A, by using the optical fiber connection tool according to the present invention, the optical fiber connection work can be performed as in the case of the optical fiber connection component 501 described above. Note that the optical fiber connector 502 configured by incorporating the ferrule 71A with a connection mechanism also has a wedge insertion hole 507 for insertion of the opening and closing members 2 and 3 on the side of the housing 511, so that the present invention is concerned. The optical fiber connecting tool can be used as an optical fiber connecting component that can perform an optical fiber connecting operation.
The connection mechanism opened by the optical fiber connection tool 1 when the newly installed optical fiber to be butt-connected in the connection mechanism 110 to the existing optical fiber 61 that is the ferrule-side optical fiber 61 is an optical fiber ribbon. In order to insert an optical fiber (optical fiber ribbon) into 110 and connect to the optical fiber 61 of the ferrule 71, a plurality of wires exposed at the tip (the same number as the number of alignment grooves 112a) Each of the bare optical fibers is inserted into the guiding groove 112d at the bottom of the covering housing groove 112c of the base side element 112 and pushed into the ferrule 71 side. It can be inserted into the aligning groove 112a, and the covering portion of the optical fiber (optical fiber tape core wire) is housed in the covering housing grooves 112b and 112c. . In accordance with the optical fiber connection method according to the present invention, the connection mechanism 110 (specifically, the open / close members 2 and 3 are pulled out while the butted state of the bare optical fiber of the optical fiber ribbon and the ferrule side optical fiber 61 is maintained. When the connection element 111) is closed, the optical fibers are first clamped and held in the first clamp portion 118 while maintaining the butted state, and then the optical fiber (optical fiber ribbon) is held in the second clamp portion 119. As in the case of the optical fiber connection component 501, the optical fiber clamp holding can be realized in a state in which unnecessary bending of the optical fiber is eliminated.

  In the case of this ferrule 71A with a connection mechanism, it is possible to insert a single-core optical fiber such as a single-core optical fiber into the connection mechanism 110 to connect to the optical fiber 61 on the ferrule 71 side, When the connection element 111 of the connection mechanism 110 is closed by pulling out the opening / closing members 2 and 3 according to the optical fiber connection method according to the present invention, the connection state of the optical fibers can be maintained. The second clamp part 119 can also clamp and hold a single optical fiber. In this case, a single optical fiber can be inserted one by one from the coating housing grooves 112b and 112c into the aligning groove 112a. Also in the case of a single optical fiber, the bare optical fiber exposed by removing the coating at the tip is inserted into the aligning groove 112a.

  The ferrule 71A with a connection mechanism described above has a structure using the multi-core ferrule 71. As an optical fiber connection part according to the present invention, for example, a ferrule that is an MT type optical connector is a single core. As a connection mechanism, a structure for a single core, that is, a structure in which only one aligning groove or one covering housing groove is formed can be used.

FIGS. 21A to 21C and 22 show a case where the optical fiber clamp 201 is attached to the optical fiber connection mechanism 1. As shown in FIG. 21C, the optical fiber clamp 201 has a structure in which an elastic body 202 such as a sponge is held by a frame body 203. The optical fiber clamp 201 is disposed at a position (for example, several tens to several hundreds mm) away from the base 101 by attaching to the support rod 204 fixed to the side of the base 101 of the optical fiber connection mechanism 1. Is done. In the support rod 204, a fitting pin 204a protruding at one end in the longitudinal direction is inserted and fitted into a fitting hole 109a opened on the side surface of the base 101, and a magnet 204b fixed at one end in the longitudinal direction is further attached to the base 204. It is detachably attached to the base 101 by being magnetically attracted to the magnet 109b provided on the base 101. The optical fiber clamp 201 fits a fitting pin 205 protruding from the side of the frame body 203 into a fitting hole 204c opened at the other longitudinal end portion of the support rod 204, so that the longitudinal direction of the support rod 204, etc. Removably attached to the end. However, the mechanism for detachably attaching one end of the support rod 204 in the longitudinal direction to the base 101 and the mechanism for detachably attaching the optical fiber clamp 201 to the other longitudinal end of the support rod 204 are not limited to those described above. Various types can be adopted. Moreover, the structure which attaches | detaches with respect to the base 101 so that the components with which the support rod and the optical fiber clamp were integrated is also employable.
The optical fiber clamp 201 is simple by simply pushing an optical fiber that performs insertion work into the optical fiber connection component 5 fitted in the component storage groove 103 of the optical fiber connection tool into the slit 206 formed in the elastic body 202. It is a member that can be supported. The slit 206 has a shape cut from a side surface of a portion of the elastic body 202 exposed from the frame body 203. The optical fiber inserted into the slit 206 can be easily taken out from the slit.

  When the optical fiber connection component 5 is, for example, the ferrules 7A and 71A with a connection mechanism described above or an optical fiber connector configured to incorporate such ferrules 7A and 71A with a connection mechanism, the optical fiber connection component 5 is stored in the component storage groove 103. The optical fiber connection component 5 is supported by the base 101 in a direction in which the connection mechanism is on the side of the optical fiber clamp 201 with respect to the ferrule among the ferrule and the connection mechanism. For example, an optical fiber that has been inserted into the optical fiber connection component 5 in the component storage groove 103 is clamped and held by the optical fiber clamp 201, and the optical fiber is bent between the optical fiber connection component 5 and the optical fiber clamp 201. The rigidity of the optical fiber itself that attempts to return to a straight line can be used to secure the pushing force of the optical fiber into the optical fiber connecting component 5. In addition, as shown in FIG. 21C, when a plurality of slits 206 are formed in the elastic body 202, a plurality of optical fibers (for example, single-core optical fibers) are inserted into the ferrule 71A with a connection mechanism. The optical fiber clamp 201 can be used for temporarily fixing the optical fiber in the operation of connecting to the optical fiber on the ferrule 71 side.

  As another configuration example, the support rod 204 slidably supports the optical fiber holder holding the optical fiber in a direction in which the optical fiber holder is advanced and retracted with respect to the holding position of the optical fiber connecting component in the base 101. The structure which is a member is also employable.

Examples of the optical fiber connection tool according to the present invention include a tool in which the support rod 204 described above is attached to the base 101 and a tool in which the optical fiber clamp 201 is further attached.
The optical fiber connecting component 20 shown in FIGS. 16 to 18 (a) to 18 (c) is configured as a single-core mechanical splice, and the basic configuration is shown in the first embodiment. It is the same as that. However, the optical fiber connecting component 20 can function as a multi-fiber by forming a plurality of alignment grooves 32a and covering housing grooves 32b and 32c, which will be described later, side by side.
That is, the optical fiber connection component 20 is composed of only the connection mechanism 30 and is formed of a connection element 31 formed of a plastic material or the like, and a metal or the like fitted on the outside of the connection element 31. And a clamp spring 37.

  The connecting element 31 has a split structure in which a prismatic base side element 32 and a prismatic lid side element 33 are combined, and the lid side element 33 is a first lid side element 34 in the axial direction. The second lid side element 35 and the third lid side element 36 are divided into three. An alignment groove 32a is provided on the surface of the base side element 12 facing the second lid side element 35, and the alignment between the one optical fiber 40 and the other optical fiber 41 is precisely performed by the alignment groove 32a. Can be done. On the surface of the base side element 12 facing the first and second lid side elements 34, 36, coating housing grooves 32b, 32c for housing the coating portions of the optical fibers 40, 41 are continuous from the alignment groove 32a. Is formed. The covering housing grooves 32b and 32c are grooves with lower alignment accuracy than the alignment groove 32a, and the optical fibers 40 and 41 inserted into the connection mechanism 30 from the outside of the optical fiber connection component 20 are aligned with the alignment grooves 32a. Also serves as an invitation groove leading to In the illustrated example, the alignment groove 32a and the covering and housing grooves 32b and 32c are V-grooves, but are not limited thereto, and various shapes can be employed. In the present embodiment, the optical fibers 40 and 41 are optical fiber core wires, and the bare optical fibers 40a and 41a exposed at the tips of the optical fibers 40 and 41 are inserted into the alignment groove 32a. Connected. The formation position of the covering housing groove may be a surface of the first and second lid-side elements 34 and 36 facing the base-side element 12, and the first and second lid-side elements 34 and 36 of the base-side element 12. And the opposing surface of the first and second lid-side elements 34 and 36 to the base-side element 12 may be used. The alignment groove is not limited to the base side element, and can be formed on the lid side element or on both the lid side element and the base side element.

  On the outside of the base side element 32 and the lid side element 33 of the connection element 31, a clamp spring 37 having a U-shaped cross section having the same configuration as that shown in the first embodiment is fitted. The base side element 32 and the lid side element 33 are held in a joined state by the urging force. In this case, the joint between the base side element 32 and the lid side element 33 is positioned in the opening of the clamp spring 37. Further, at two locations in the longitudinal direction of the clamp spring 37, cutout portions 37a that are cut from the opening end face to a predetermined position are provided, and the first lid side element 34 is based on the left portion of the clamp spring 37 by this cutout portion 37a. The second lid side element 35 is biased toward the base side element 32 at the center portion, and the third lid side element 36 is biased toward the base side element 32 at the right side portion. It has come to be energized.

  The first lid side element 34, the part of the base side element 32 corresponding to the first lid side element 34, and the left side part of the clamp spring 37 fitted on the outside thereof constitute a first clamp part 42, A portion of the base side element 32 corresponding thereto and a central portion of the clamp spring 37 fitted on the outside thereof constitute a second clamp portion 43 (one clamp portion), and the third lid side element 36 and A third clamp portion 44 (another clamp portion) is configured by a portion of the base side element 32 corresponding thereto and a portion on the right side of the clamp spring 37 fitted on the outside thereof.

  In order to connect the two optical fibers 40 and 41 by the optical fiber connecting component 20 using the optical fiber connecting tool 1 according to this embodiment configured as described above, the optical fiber connector is connected to the 20 base 101. The first opening / closing member 2 and the second opening / closing member 3 are advanced in the direction of the optical fiber connecting component 20 by operating the drive mechanism, and the tip of the first opening / closing member 2 resists the urging force of the clamp spring 37. Then, the connection element 31 is inserted between the second lid side element 35 and the base side element 32, the second lid side element 35 is opened, and the tip of the second opening / closing member 3 is resisted against the urging force of the clamp spring 37. Then, it is inserted between the third lid side element 36 and the base side element 32, and the third lid side element 36 is opened. One optical fiber 40 is inserted in advance into the aligning groove 32a from one side of the connection mechanism 30, and the tip thereof is disposed on the aligning groove 32a, and the covering portion is placed on the first lid side element 34 and the base. The clamp is fixed between the element 32 and the element 32. The coating portion of the optical fiber 40 is housed in the coating housing groove 32 b and clamped and fixed to the first clamp portion 42. The first clamp part 42 functions as an optical fiber fixing part.

  Then, the other optical fiber 41 is inserted along the alignment groove 32 a from the other end side of the connection element 31, and the tip of the other optical fiber 41 is connected to the second lid side element 35 via the third lid side element 36. And the base-side element 32, and butt-connect to the tip of one optical fiber 40.

  Then, the other optical fiber 41 is pressed with a predetermined force in the direction of the one optical fiber 40 to secure the butting force between the optical fibers 40 and 41, and the drive mechanism is operated to move the first opening / closing member 2 to the first position. 2 Pull out from between the lid-side element 35 and the base-side element 32, close the second lid-side element 35 by the biasing force of the clamp spring 37, and one light between the second lid-side element 35 and the base-side element 32. The tip of the fiber 40 (the bare optical fiber 40a exposed at the tip of the optical fiber 40) and the tip of the other optical fiber 41 (the bare optical fiber 41a exposed at the tip of the optical fiber 41) are clamped. , 41 are held in a state in which the tips of each other are butt-connected.

And after closing the 2nd clamp part 43, the force which presses the other optical fiber 41 to the direction of one optical fiber 40 is cancelled | released, a drive mechanism is operated, and the 2nd opening-and-closing member 3 is made into the 3rd lid side. Withdrawing from between the element 36 and the base side element 32, the third lid side element 36 is closed by the urging force of the clamp spring 37, and the other optical fiber 41 is connected between the third lid side element 36 and the base side element 32. Clamp the cover.
In this way, one optical fiber 40 and the other optical fiber 41 can be held in a state in which their tips are butted and connected via the optical fiber connecting component 20.

In the optical fiber connecting tool 1 according to this embodiment configured as described above, the first opening / closing member 2 and the second opening / closing member 3 are independently operated, and the first opening / closing member 2 is pulled out to be second. Since the second opening / closing member 3 is pulled out and the third side element 36 is closed after the lid side element 35 is closed, when the other optical fiber 41 is abutted against the tip of one optical fiber 40, the abutting Even if the distal ends of both optical fibers 40 and 41 are bent by force, the third lid side element 36 is still open when the second lid side element 35 is closed, so that the deflection is caused by the other light. The third lid side element 36 can be closed after the deflection can be completely (or almost) removed.
Therefore, both optical fibers 40 and 41 are clamped in a state in which the distal ends of both optical fibers 40 and 41 are bent, and the loss increases due to bending of the optical fibers 40 and 41 and the distal ends of both optical fibers 40 and 41. The stress does not concentrate on the portion and breakage is eliminated, connection failure can be eliminated, and the reliability can be greatly improved.

19 and 20 show a third embodiment of an optical fiber connection tool according to the present invention. This optical fiber connection tool 45 includes a first opening / closing member 47, a support member 48, and an operation lever 46. , The second opening / closing member 49 is mounted on the support member 48, and the pin 50 provided on the support member 48 is positioned in the elongated hole 51 provided on the second opening / closing member 49, Other configurations are the same as those shown in the first and second embodiments.
And in what is shown in this embodiment, when there exists an effect similar to what is shown to the said 1st and 2nd embodiment, and the new optical fiber is faced | matched to the front-end | tip of the existing optical fiber Or when the leading end of the other optical fiber is butted against the leading end of one optical fiber, even if the leading ends of both optical fibers are bent by the butting force, the first lid side element or the second lid side element Since the second lid side element or the third lid side element is still open when the lid is closed, the deflection can be released in the direction of the newly installed optical fiber or the other optical fiber, and completely (or almost) After removing the deflection, the second lid side element or the third lid side element is closed.

  Therefore, both optical fibers are clamped in a state where the butt connection portion of both optical fibers remains bent, and loss increases due to bending of the optical fibers and stress concentrates on the tip portions of both optical fibers and breaks. Therefore, connection failure can be eliminated, and reliability can be greatly improved.

In this embodiment, when the operation lever 46 is operated in the direction of the optical fiber connection component (specifically, the direction of the connection mechanism), the first opening / closing member 47 and the second opening / closing member 49 are simultaneously moved in the direction of the connection mechanism. (Specifically, with respect to the second opening / closing member 49, the rear end facing the leading end side (the upper end in FIG. 19 and the right end in FIG. 20) inserted into the connection mechanism of the second opening / closing member 49) When the operation lever 46 is operated in a direction away from the connection mechanism, the first opening / closing member 47 is separated from the connection mechanism integrally with the operation lever 46. The pin 50 of the support member 48 comes into contact with the end surface of the elongated hole 51 of the second opening / closing member 49 with a time difference, so that the second opening / closing member 49 moves away from the connection mechanism. It will be retirement. Therefore, the mechanism for operating the first opening / closing member 47 and the second opening / closing member 49 can be simplified.
In each of the above-described embodiments, the configuration in which the closing operation of the other clamping unit is started after the closing of one clamping unit is illustrated. However, the present invention is not limited to this, and the closing of the one clamping unit is performed. It is also possible to adopt a configuration in which the closing operation of the other clamp portion is started before the operation is completed (before the existing and new optical fibers are clamped in one clamp portion).

It is the schematic which shows 1st Embodiment of the optical fiber connection tool by this invention, (a) is a top view, (b) is a front view, (c) is a cross section which shows the guide groove vicinity of an optical fiber connection tool FIG. It is a figure which shows an example of an optical fiber connector, (a) is a top view, (b) is a cross-sectional view which shows the internal structure of an optical fiber connector. It is a front view which shows the optical fiber connector of FIG. It is a longitudinal cross-sectional view which shows the internal structure of the optical fiber connector of FIG. It is a figure which shows the structure of the ferrule with a connection mechanism of the optical fiber connector of FIG. 2, (a) is a disassembled perspective view, (b) is the lid side element which comprises the connection mechanism of the ferrule with a connection mechanism of (a), It is the figure seen from the opposing surface side with respect to a base side element. It is a top view which shows the state which hold | maintained the optical fiber connector of FIG. 2 to the optical fiber connection tool. It is a front view which shows the structure of the ferrule with a connection mechanism of the optical fiber connector of FIG. It is a front view which shows the positional relationship of the ferrule with a connection mechanism in FIG. 6, and the opening / closing member of an optical fiber connection tool. 8 shows a state in which the first clamp part and the second clamp part are opened by inserting the first opening / closing member into the first clamp part of the ferrule with the connection mechanism of FIG. 8 and inserting the second opening / closing member into the second clamp part. FIG. It is explanatory drawing which showed the state which inserted the new optical fiber in the state which opened the 1st clamp part and the 2nd clamp part, and faced the end surface of the new optical fiber with the end surface of the existing optical fiber. It is explanatory drawing which showed the state which pulled out the 1st opening / closing member from the 1st clamp part, and closed the 1st clamp part. It is explanatory drawing which showed the state which pulled out the 2nd opening-and-closing member from the 2nd clamp part, and closed the 2nd clamp part. It is a figure which shows the other example of the ferrule with a connection mechanism, (a) is a top view, (b) is a front view of the ferrule with a connection mechanism of (a), (c) is a ferrule with a connection mechanism of (a). It is the figure seen from the rear end part (end part on the opposite side to the end part connected with the ferrule) side. It is a top view which shows the opposing surface which faces the cover side element of the base side element which comprises the connection mechanism of the ferrule with a connection mechanism of FIG. It is a perspective view which shows the example of the optical fiber connector comprised by incorporating the ferrule with a connection mechanism of FIG. It is a figure which shows the 2nd Embodiment of this invention, Comprising: It is a schematic plan view which shows the example which applied the optical fiber connection component which comprises a mechanical splice to the optical fiber connection tool by this invention. It is a front view of the optical fiber connection component of FIG. It is a figure which shows the cross-section of the optical fiber connection component of FIG. 16, (a) is sectional drawing which shows one of the clamp parts located in the both opposing sides of one clamp part, (b) shows one clamp part. Cross-sectional view, (c) is a cross-sectional view showing the other (other clamp portion) of the clamp portions located on opposite sides of one clamp portion. It is the schematic plan view which showed 3rd Embodiment of the optical fiber connection tool by this invention. It is sectional drawing which shows the opening-and-closing member of the optical fiber connection tool of FIG. (A) is a top view which shows the state which installed the optical fiber clamp in the place away from the component accommodation groove | channel via the support rod attached to the optical fiber connection tool of FIG. 1, (b) is (a). It is a side view which shows this optical fiber clamp. FIG. 22 is an exploded plan view showing an attaching / detaching mechanism between the optical fiber connecting tool and the support rod of FIG. 21 and an attaching / detaching mechanism between the support rod and the optical fiber clamp.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Optical fiber tool, 2 ... 1st opening / closing member, 3 ... 2nd opening / closing member, 5 ... Optical fiber connector (optical fiber connection component), 6, 17 ... Optical fiber, 7 ... Ferrule, 10 ... Connection mechanism, 11 ... Connecting element, 12 ... Base side element, 13 ... Lid side element, 14 ... First lid side element, 15 ... Second lid side element, 16 ... Clamp spring, 18 ... First clamp part (one clamp part), 19 ... 2nd clamp part (other clamp part), 20 ... Optical fiber connection parts.

Claims (5)

The first opening / closing member and the second opening / closing member are moved forward with respect to the ferrule with a connection mechanism in which the optical fiber protrudes from the rear end of the ferrule to which the optical fiber is inserted and fixed. Is inserted between the first lid side element and the base side element of the connecting element against the urging force of the clamp spring to open the first lid side element, and the tip of the second opening / closing member Is inserted between the second lid side element and the base side of the connection element against the urging force of the clamp spring to open the second lid side element and adjust from the other end side of the connection element. Insert the tip of the new optical fiber along the core groove, connect the tip of the new optical fiber to the tip of the ferrule-side optical fiber, and connect the new optical fiber in the direction of the ferrule-side optical fiber. Press to open and close the first The material is pulled out from between the first lid side element and the base side element, the first lid side element is closed by the biasing force of the clamp spring, and the ferrule side optical fiber is between the first lid side element and the base side element. The tip of each of the optical fibers and the tip of the newly installed optical fiber are clamped and held in a state where the tips of both optical fibers are butt-connected to each other, and then the second opening / closing member is placed between the second lid side element and the base side element. The second lid side element is closed by the urging force of the clamp spring, and the covering portion of the new optical fiber is clamped between the second lid side element and the base side element, or the second Before the first opening / closing member is pulled out from between the first lid side element and the base side element and the first lid side element is closed by the biasing force of the clamp spring, the second opening / closing member is moved to the second lid side element. Or between the base side element The operation of pulling out and closing the second lid side element by the biasing force of the clamp spring is started, and the tip of the ferrule side optical fiber and the newly installed optical fiber are inserted between the first lid side element and the base side element. Clamping the tip and holding the ends of both optical fibers butted and connected, and clamping the covering portion of the new optical fiber between the second lid side element and the base side element,
An optical fiber connecting method, wherein the tip ends of the first opening and closing member and the second opening and closing member are formed so as to gradually reduce the thickness toward the tip .   The connection mechanism has a split structure formed by combining a base-side element and a lid-side element divided into two parts, and is fitted on the outside of these connection elements so that the base-side element, the lid-side element, The lid side element constituting one clamp part and the lid side element constituting the other clamp part are separate bodies, and the one opening and closing member is one clamp. The other opening / closing member can be inserted / removed between the lid side element and the base element constituting the other clamp part. The optical fiber connection method according to claim 1.   The new optical fiber has a bare optical fiber exposed at the tip of a coating portion covered with a coating material, and this new optical fiber is a light in which the bare optical fiber is inserted and fixed to the ferrule. 2. The optical fiber connection method according to claim 1, wherein the optical fiber is butt-connected to and clamped to the first clamp part, and the covering part is clamped to the second clamp part. After the butt connection of the new optical fiber to the existing optical fiber, the new optical fiber is pressed against the optical fiber inserted and fixed in the ferrule, and the butt force between the optical fibers is secured. closing a first clamp portion, the optical fiber connection method according to claim 1 which releases said butting force, characterized in that closing said second clamping portion. A clamp portion that clamps the vicinity of the butt connection portion of the optical fiber that is butt-connected to maintain the butt connection state;
An optical fiber connecting part comprising a connection mechanism having a clamp part for clamping a new optical fiber that butt-connects to an existing optical fiber that is inserted in advance in the one clamp part among the optical fibers Use
The connection mechanism clamps the existing optical fiber stored in the connection mechanism in advance and the new optical fiber separate from the existing optical fiber by the clamp portion of the connection mechanism, and connects the connection. When clamping the new optical fiber by the other clamp part of the mechanism,
One open / close member that can be inserted into and removed from the one clamp portion is inserted into the one clamp portion to open the one clamp portion, and the other open / close member that can be inserted into and removed from the other clamp portion. Insert the other clamp part and open the other clamp part,
In this state, the new optical fiber is inserted from the side opposite to the existing optical fiber, the tip of the new optical fiber is butted and connected to the tip of the existing optical fiber,
In this state, one open / close member is pulled out from one clamp part, and the tip of these optical fibers is clamped in a state where the existing optical fiber and the new optical fiber are butted and connected by one clamp part,
After this, pull out the other opening and closing member from the other clamp part, or clamp the new optical fiber by the other clamp part,
Alternatively, before one of the opening and closing members is pulled out from one clamp portion and the existing optical fiber and the new optical fiber are butted and connected by the one clamp portion, the operation of clamping the tips of these optical fibers is completed. In addition, the other opening and closing member is pulled out from the other clamp part, and the operation of clamping the new optical fiber by the other clamp part is started.
The optical fiber connecting method, wherein the tip ends of the one and the other opening / closing members are formed so as to gradually reduce the thickness toward the tip .

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