JP2010112972A - Optical fiber connecting device and assembling method for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily connect optical fibers to each other at low cost in optical works. <P>SOLUTION: An optical fiber connecting device at least includes: a connector 1 at least including guide holes 5a, 5b for penetrating optical fibers and a connecting groove 16 for bringing the optical fibers penetrating through the guide holes into contact with each other; and adhesively bonding parts 4a, 4b fixing the optical fibers penetrated through the connector 1. By using the device, an optical fiber strand 1a is penetrated through the guide hole 5a to the connecting groove 16, and fixed by the adhesively bonding part 4a, an optical fiber strand 1b is penetrated from the guide hole 5b to the connecting groove 16, and after the optical fiber strands 1a, 1b abuts on each other at the connecting groove 16 to form a connecting part 3, the optical fiber strand 1b is fixed by the adhesively bonding part 4b. Thus, the optical fibers can be stably connected to each other without polishing the end faces, and without large-scale apparatus and connecting tool. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical fiber connecting device for connecting optical fibers in an optical equipment such as an underground / aerial optical equipment or an apartment house or a detached house, and an assembling method thereof.

Conventionally, when connecting optical fibers in optical equipment such as underground / aerial light facilities or apartment houses, detached houses, etc., the optical fibers are cut, their end surfaces are butted against ferrules, and the ferrules are connected via an adapter or the like. Connector connection technology for connection (for example, see Non-Patent Document 1), fusion-splicing technology for connecting the end faces of the optical fibers as they are, and melting the connection portion by arc discharge (for example, see Non-Patent Document 2) ), A connection method such as a mechanical splice connection technique in which the end faces of the optical fibers are abutted with each other via a refractive index matching agent and the connection portion is mechanically gripped (for example, refer to Non-Patent Document 3) is used. ing.
FTTH construction technology that supports the optical communication era, Optronics Inc., issued July 6, 2004, p. 129-160 FTTH construction technology that supports the optical communication era, Optronics Inc., issued July 6, 2004, p. 83-102 FTTH construction technology that supports the optical communication era, Optronics Inc., issued July 6, 2004, p. 119-128

  However, with regard to the connector connection technology, it is necessary to polish the end faces in order to abut the optical fibers, and specialized skills and dedicated tools with high difficulty are required. As for the fusion splicing technique, a large-scale device that generates arc discharge is required. The mechanical splice connection technique has a problem in that durability and reliability depend on the characteristics of the refractive index matching agent because the refractive index matching agent is interposed in the fiber connection portion. The complexity of these construction procedures, the cost factors, and the increase in the failure rate have led to a decrease in the efficiency of optical construction and a high cost.

  In addition, as a conventional connection technique, there are a method of mechanically fixing optical fibers to each other and a method of electrically melting and fusing them together. It is impossible to connect only with the connecting tool to be used, and an assembly tool for assisting the mechanical / electrical method is required.

  The present invention has been made in view of the above problems, and as a connection technology for connecting optical fibers to each other, by connecting optical fibers with each other without using a mechanical / electrical method, An object of the present invention is to easily and inexpensively connect optical fibers in optical work by using or minimizing an auxiliary assembly tool.

  In order to solve the above-mentioned problems, in the optical fiber connection device of the present invention, a connection device including at least a guide hole for inserting an optical fiber and a connection groove for abutting optical fibers inserted from the guide hole, And at least an adhesive portion for fixing the optical fiber inserted into the connecting device.

  The connecting device includes a bonding hole and / or a slit for conducting an electrical connection between the outside and the bonding portion.

  The connection groove has a circular or V-shaped cross section.

  The connection groove has bent portions at both ends or one end thereof.

  The connection groove includes a connection reinforcing material having a V-groove or a V-groove.

  The connecting device has a window corresponding to a butt portion of the optical fiber.

  The connecting device is made of a transparent material.

  In addition to the above, a protective sleeve for covering the entire connection device together with the optical fiber fixed in contact with each other, a fixing band for fixing a part of the connection device, or an adhesive or tape for covering only the gap of the connection device is included. And

  In order to solve the above-mentioned problem, in the optical fiber connection device of the present invention, a connection tool including at least a guide hole for inserting an optical fiber and a connection groove for abutting optical fibers inserted through the guide hole. The connection reinforcing material detachably disposed in the connection groove, an adhesive portion for fixing the optical fiber inserted into the connection device to the connection reinforcing material, and the entire connection reinforcing material together with the optical fiber fixed in contact with each other. It includes at least an adhesive or a tape that covers only a gap between the protective sleeve to be covered or a part of the connection reinforcing material or a gap between the connection reinforcing materials.

  As an optical fiber connected by the optical fiber connection device of the present invention, the connection end face is tapered.

  The method for assembling the optical fiber connection device of the present invention is such that after inserting the first optical fiber from one of the guide holes of the connection tool of the optical fiber connection device into the connection groove, the first optical fiber is fixed by the adhesive portion, and the other guide hole is also used. The second optical fiber is inserted into the connection groove, the first and second optical fibers are butted together, and then the second optical fiber is fixed by an adhesive portion.

  In the method of assembling the optical fiber connection device of the present invention, the first optical fiber is inserted from one of the guide holes of the connection tool of the optical fiber connection device into the connection groove, and then fixed at the adhesive portion, and the other guide hole is fixed. Similarly, after inserting the second optical fiber into the connection groove and butting the first and second optical fibers together, the second optical fiber is fixed by an adhesive portion, and the optical fiber fixed by butting together with the connecting device It is characterized by being covered with a protective sleeve or a fixing band, an adhesive or a tape.

  Furthermore, in the method of assembling the optical fiber connection device of the present invention, the first optical fiber is inserted from one of the guide holes of the connection tool of the optical fiber connection device into the connection groove in which the connection reinforcing material is disposed, and then the bonding portion The second optical fiber is inserted into the connection groove in the same way from the other guide hole, and the first and second optical fibers are abutted with each other. The optical fiber fixed to the material and abutted and fixed is separated from the connection device together with the connection reinforcing material, and is covered with a protective sleeve, a fixing band, an adhesive, or a tape together with the connection reinforcing material.

  In the optical fiber connecting device of the present invention, the fiber end face can be connected to the physical contact by abutting the optical fiber from which the coating is removed and the end face is cleaved and cut. In this state, the optical fiber is fixed by the bonding portion, Contact connection can be maintained. When pressing is required to make the physical contact connection, an insertion force by the installer may be used, or a bending restoring force that is generated outside the insertion end during insertion may be used. When the physical contact connection is insufficiently pressed, the required pressure can be lowered by using an optical fiber having a tapered connection end face.

  Further, a protective sleeve, a fixing band, an adhesive, a tape, or the like that covers the connecting device or the connection reinforcing material may serve to compensate for a lack of fixing force at the bonding portion.

  According to the present invention, it is possible to stably connect optical fibers without requiring polishing of the end face, without requiring a large-scale device, and without intervention of a refractive index matching agent. This leads to simplification of construction and cost reduction.

  Further, according to the present invention, it is possible to provide an optical fiber connecting device that can be operated without using a connecting tool, and can be easily connected at low cost, and an assembling method thereof.

  The best mode for carrying out the present invention will be described below with reference to the drawings. In the following description, the constituent elements of the invention will be described with numerical symbols. However, when there are two or more same constituent elements and it is necessary to distinguish them, the reference numerals are appended with alphabets such as a and b. It shall represent.

  FIG. 1 is a perspective view showing a first embodiment of the present invention.

  The connecting device 1 includes guide holes 5a and 5b through which optical fibers are inserted at both ends, and includes a connection groove 16 so as to penetrate the guide holes 5a and 5b. The connection groove 16 can be inserted into the optical fiber strands 1a and 1b through the guide holes 5a and 5b.

  The optical fiber strands 1a and 1b can abut end surfaces of the optical fiber strands 1a and 1b in the connection groove 16, and the abutted portion becomes the connection portion 3. These optical fiber strands 1a and 1b are coated and removed at their tip portions like optical fiber strands (cover removal portions) 2a and 2b, and have a smaller diameter than the optical fiber strands 1a and 1b. Further, when the optical fiber strands 1a and 1b are abutted, they are bonded by an adhesive at the bonding portions 4a and 4b in the connection groove 16, and fixed in a state where the optical fiber strands 1a and 1b are abutted. I can do it.

  As the bonding portions 4a and 4b, an adhesive is injected from the gap between the guide holes 5a and 5b, or an adhesive sealed in a solid or gel adhesive or vinyl container in the guide holes 5a and 5b in advance. It can be realized by arranging the agent.

  Further, the connection groove 16 may be provided with a V-groove, and in this case, the optical fiber strands 1a and 1b can be easily and accurately aligned.

  In addition, the connecting device 1 of the present invention can be made of a colorless and transparent material. In this case, the location of the optical fiber strands 1a and 1b in the connecting groove 16 can be confirmed, and alignment is easy. And can be done accurately.

  2a to 2c are a perspective view and a cross-sectional view showing a second embodiment of the present invention.

  Unlike the embodiment of FIG. 1, the connecting device 1 of FIG. 2a includes a bonding hole 6 that conducts the connection between the outside and the connecting groove 16 and the bonding portions 4a and 4b. As shown in FIG. 2 b, the bonding hole 6 is electrically connected to the connecting groove 16 and the bonding portion 4 that is conductive to the connecting groove 16.

  That is, a method of injecting the adhesive 11 from the bonding hole 6 to the bonding part 4, and melting and bonding the adhesive 11 previously provided in the bonding part 4 by injecting a chemical or the like from the bonding hole 6. Method, as shown in FIG. 2c, an adhesive 11 previously sealed in a container or the like is placed in the bonding portion 4, and the container is broken from the bonding hole 6 by means such as the bonding button 8 and bonded. The optical fiber 1 can be bonded by a method or the like. When this bonding button 8 is used, it is not necessary to close the bonding hole 6 after bonding the optical fiber 1, so that the connection work can be shortened.

  3 and 4 are cross-sectional views showing the bonding methods according to the third and fourth embodiments of the present invention.

  In FIG. 3, an adhesive portion 4 is provided around the optical fiber 1, and an adhesive 11 is provided on the adhesive portion 4. The adhesive 11 is solid, gel, or liquid in a container. Here, by applying thermal energy A to the connection device 1, in the case of a solid or gel adhesive, it can be melted, and an adhesive force is generated in the adhesive 11. In addition, in the liquid sealed in the container, the adhesive 11 is leaked to the bonding portion 4 by melting the container, and an adhesive force is generated.

  Further, in FIG. 4, an adhesive recess 9 is provided above and below the adhesive portion 4, the adhesive recess 9 is provided with an adhesive needle 10, and the liquid adhesive 11 sealed in the container is used. , The container can be damaged by applying pressure to the connecting device 1 with the pressing force B, and the adhesive 11 can leak to the bonding portion 4 to generate an adhesive force.

  FIG. 5 is a cross-sectional view showing a connection groove according to the fifth embodiment of the present invention.

  In FIG. 5, the connecting groove 16 and the bonding portion 4 of the present invention have a V-shaped cross section. This V-shape is created substantially in accordance with the size of the optical fiber 1, and assuming that the cross section of the optical fiber 1 is circular, a triangle having a cross section of the optical fiber 1 as an inscribed circle It is the size that draws. Since this connection groove 16 is V-shaped, it is possible to easily align the optical fiber strands (cores) of the optical fiber strand 1. In this case, it is not necessary to provide the V groove in the connection groove 16.

  FIG. 6 is a cross-sectional view showing a sixth embodiment of the present invention.

  Although the cross section of the connection device 1 in FIGS. 1 to 5 is formed in a rectangular shape, the cross section of the connection device 1 in FIG. 6 is formed in a circular shape. Since the connecting device 1 has a circular cross section, for example, when a flexible resin such as vinyl chloride, polyethylene, polyolefin, urethane, or silicon resin is used, it is easy to bend and handle in the direction of 360 degrees.

  FIG. 7 is a perspective view showing a connection groove according to a seventh embodiment of the present invention.

  In FIG. 7, the connection device 1 is provided with a slit 12 that conducts the connection groove 16 and the bonding portions 4 a and 4 b to the outside. The slit 12 has the same size as the diameter of the connection groove 16 and the guide hole 5 (however, it is drawn small in the drawing for convenience), and not only the optical fiber 1 is inserted through the guide hole 5 but also the slit. 12 can also be inserted.

  Moreover, by providing the slit 12, it is possible to confirm the location of the optical fiber strands 1a and 1b in the connection groove 16, and alignment can be performed easily and accurately.

  FIG. 8 is a perspective view showing an eighth embodiment of the present invention.

  In FIG. 8, the connection reinforcing member 13 is provided in the connection groove 16. The connection reinforcing material 13 can be separated from the connection groove 16. Further, the bonding portion 4 can be provided on the connection reinforcing material 13, and the optical fiber 1 can be fixed on the connection reinforcing material 13. The optical fiber 1 fixed to the connection reinforcing member 13 can be separated from the connection device 1 together with the connection reinforcing material 13, and it becomes possible to reduce the size by separating the connection device 1. ing.

  FIG. 9 is a perspective view showing a ninth embodiment of the present invention.

  In FIG. 9, the connecting device 1 is provided with a window 14 corresponding to the abutting portion of the optical fiber. It is possible to confirm the location of the optical fiber strands 1a and 1b in the connection groove 16 by making the window colorless and transparent resin, glass, or space, and alignment can be performed easily and accurately. It is.

  FIG. 10 is a perspective view showing a tenth embodiment of the present invention.

  As shown in FIGS. 7 and 8, the connecting device 1 of the present invention has a slit 12, and the slit 12 includes an opening / closing shaft 17 capable of opening and closing the connecting device 1, or the connecting device 1 is made of vinyl chloride. When a flexible resin such as polyethylene, polyolefin, urethane, or silicone resin is used, the slit 12 and the connecting groove 16 have a keyhole shape in cross section so that the slit diameter of the slit 12 is reduced to the connecting groove 16 and the guide hole. It is possible to make the diameter smaller than 5.

  11a and 11b are perspective views showing an eleventh embodiment of the present invention.

  In FIG. 11, bent portions 19 are provided at both ends or one end of the connection groove 16 provided in the connection device 1. It is possible to bend the optical fiber 1 inserted through the guide hole 5 by the bent portion 19 and abut the optical fiber 1a and 1b. This bending makes it possible not only to insert the optical fiber strands 1a and 1b from opposite directions, but also to insert the optical fiber strands 1a and 1b from the same direction.

  At this time, the adhesive portion 4 is provided between the bent portion 19 and the connecting portion 3 as shown in FIG. 11a to remove the pressing force of the bent portion 19, or the bent portion 19 and the guide hole 5 as shown in FIG. 11b. By providing the bonding portion 4 between the two, the pressing force of the bent portion 19 can be continuously applied even after bonding.

  12a to 12e are perspective views showing a twelfth embodiment of the present invention.

  As shown in FIG. 12 a, the optical fiber 1 a is inserted in the direction of arrow C from one guide hole 5 a provided in the connection tool 1 into the connection groove 16.

  Next, by injecting the adhesive from the gap of the guide hole 4a from the direction of arrow D in the bonding portion 4 provided in the connection groove 16 with the optical fiber 1a inserted through the connection groove 16 as shown in FIG. Glue and fix.

  Next, as shown in FIG. 12c, the optical fiber strand 1b to be connected is inserted in the direction of arrow E from the other guide hole 5b and abutted against the already fixed optical fiber strand 1a.

  Next, by injecting adhesive from the gap of the guide hole 4b from the direction of arrow F in the bonding portion 4b provided in the connection groove 16 with the optical fiber 1b inserted into the connection groove 16 as shown in FIG. Glue and fix.

  Finally, by inserting the protective sleeve 15 in the direction of the arrow G so as to cover the connection device 1 as shown in FIG. 12e, the optical fibers can be connected.

  In this case, when the connecting device 1 includes the bonding hole 6 as shown in FIG. 2, the adhesive may be injected from the bonding hole 6, or the bonding portion 4 is previously provided with the adhesive. Is also possible. Moreover, although the tip of the optical fiber 1 is an optical fiber (coating removal part) 2 from which the coating has been removed, the coating need not be removed.

  13a to 13g are perspective views showing a thirteenth embodiment of the present invention.

  The connection reinforcing member 13 is inserted into the connection groove 16 from the guide hole 5 or the slit 12 provided in the connection tool 1 as shown in FIG. 13a. This connection reinforcing member 13 is provided with a V-groove. In this case, it is possible to align easily and accurately when the optical fiber is inserted.

  Next, as shown in FIG. 13 b, the optical fiber 1 a is inserted in the direction of the arrow C from one guide hole 5 a provided in the connection instrument 1 into the connection groove 16 or through the slit 12.

  Next, as shown in FIG. 13c, the optical fiber 1a inserted into the connection groove 16 is connected by injecting adhesive from the gap of the guide hole 4a from the direction of arrow D in the bonding portion 4 provided in the connection groove 16. Adhering and fixing on the reinforcing material 13.

  Next, as shown in FIG. 13d, the optical fiber 1b to be connected is inserted in the direction of arrow E from the other guide hole 5b or the slit 12, and abutted against the already fixed optical fiber 1a.

  Next, as shown in FIG. 13e, the optical fiber 1b inserted into the connection groove 16 is connected by injecting adhesive from the gap of the guide hole 4b from the direction of the arrow F in the bonding portion 4b provided in the connection groove 16. Adhering and fixing on the reinforcing material 13.

  Next, the optical fiber 1 fixed to the connection reinforcing member 13 in the direction of the arrow H is separated from the connection tool 1 as shown in FIG. 13f.

  Finally, as shown in FIG. 13 g, the optical fibers are connected by inserting the protective sleeve 15 in the direction of arrow G so as to cover the connection reinforcing material 13 to which the optical fiber 1 separated from the connection device 1 is fixed. It becomes possible to do.

  In this case, when the connecting device 1 includes the bonding hole 6 as shown in FIG. 2, the adhesive may be injected from the bonding hole 6, or the bonding portion 4 is previously provided with the adhesive. Is also possible. Moreover, although the tip of the optical fiber 1 is an optical fiber (coating removal part) 2 from which the coating has been removed, the coating need not be removed.

  14a and 14b are perspective views showing a fixing band according to a fourteenth embodiment of the present invention.

  Here, a substitute for the protective sleeve described in the twelfth and thirteenth embodiments is shown. For example, fixing for covering and fixing a part of the connecting device 1 as shown in FIGS. 14a and 14b. An adhesive that is injected and protected from the band 18, the guide hole 5 or the slit 12, or a tape that covers the entire connecting portion can be used instead.

  FIG. 15 is a perspective view showing a processed state of the connection end face of the optical fiber according to the fifteenth embodiment of the present invention.

  FIG. 15 shows the processing state of the connecting end face of the optical fiber connected by the connecting device of the present invention. The processing is performed by cutting the outer periphery of the connecting end face of the optical fiber 1 obliquely, and the taper processing. This is part 20. The tapered portion 20 does not reach the optical fiber strand (core) 7 that is the center of the optical fiber.

  16a and 16b are perspective views showing a sixteenth embodiment of the present invention.

  The connecting device 1 shown in FIG. 16a includes guide holes 5a and 5b at both ends thereof, and includes a connecting groove 16 so as to penetrate the guide holes 5a and 5b. The connection groove 16 can be inserted into the optical fiber strands 1a and 1b through the guide holes 5a and 5b.

  The optical fiber strands 1 a and 1 b can abut end surfaces of the optical fiber strands 1 a and 1 b in the connection groove 16, and the abutted portion becomes the connection portion 3. These optical fiber strands 1a and 1b are coated and removed at their tip portions like optical fiber strands (cover removal portions) 2a and 2b, and have a smaller diameter than the optical fiber strands 1a and 1b. Further, when the optical fiber strands 1a and 1b are abutted with each other, the portion where the optical fiber strands 1a and 1b in the connection groove 16 are abutted is provided with an adhesive portion 4, and the adhesive portion 4 is adhered by an adhesive. The optical fiber strands 1a and 1b can be fixed in a state where they are abutted.

  As the bonding portions 4a and 4b, an adhesive is injected from the gap between the guide holes 5a and 5b, or an adhesive sealed in a solid or gel adhesive or vinyl container in the guide holes 5a and 5b in advance. It can be realized by arranging the agent.

  Further, the connection groove 16 may be provided with a V-groove, and in this case, the optical fiber strands 1a and 1b can be easily and accurately aligned.

  In addition, the connecting device 1 of the present invention can be made of a colorless and transparent material. In this case, the location of the optical fiber strands 1a and 1b in the connecting groove 16 can be confirmed, and alignment is easy. And can be done accurately.

  Also, as shown in FIG. 16b, by providing the bonding portion 4 on the end face of the optical fiber 1, it is possible to bond at the moment of abutment. At this time, it is possible to prevent the conduction of light by making the adhesive 4 have the same refractive index as that of the refractive index matching agent.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some constituent elements may be deleted from all the constituent elements shown in the embodiment. Furthermore, the constituent elements over different embodiments may be appropriately combined.

It is the perspective view which showed 1st embodiment of this invention. It is the perspective view which showed 2nd embodiment of this invention. It is sectional drawing which showed 2nd embodiment of this invention. It is sectional drawing which showed 2nd embodiment of this invention. It is sectional drawing which showed the adhesion method in the adhesion part which concerns on 3rd embodiment of this invention. It is sectional drawing which showed the adhesion method in the adhesion part which concerns on 4th embodiment of this invention. It is sectional drawing which showed the connection groove | channel which concerns on 5th embodiment of this invention. It is sectional drawing which showed the 6th Embodiment of this invention. It is the perspective view which showed the 7th Embodiment of this invention. It is the perspective view which showed 8th embodiment of this invention. It is the perspective view which showed 9th embodiment of this invention. It is the perspective view which showed the 10th Embodiment of this invention. It is the perspective view which showed the 11th Embodiment of this invention. It is the perspective view which showed the 11th Embodiment of this invention. It is the perspective view which showed the 12th embodiment of this invention. It is the perspective view which showed the 12th embodiment of this invention. It is the perspective view which showed the 12th embodiment of this invention. It is the perspective view which showed the 12th embodiment of this invention. It is the perspective view which showed the 12th embodiment of this invention. It is the perspective view which showed 13th embodiment of this invention. It is the perspective view which showed 13th embodiment of this invention. It is the perspective view which showed 13th embodiment of this invention. It is the perspective view which showed 13th embodiment of this invention. It is the perspective view which showed 13th embodiment of this invention. It is the perspective view which showed 13th embodiment of this invention. It is the perspective view which showed 13th embodiment of this invention. It is the perspective view which showed the fixed band which concerns on 14th embodiment of this invention. It is the perspective view which showed the fixed band which concerns on 14th embodiment of this invention. It is the perspective view which showed the processing state of the connection end surface of the optical fiber which concerns on 15th embodiment of this invention. It is the perspective view which showed the 16th embodiment of this invention. It is the perspective view which showed the 16th embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 1a, 1b: Optical fiber strand, 2, 2a, 2b: Optical fiber strand (coating removal part) 3: Connection part 4, 4a, 4b: Bonding part, 5a, 5b: Guide hole, 6: Bonding hole, 7: optical fiber (core), 8: bonding button, 9: bonding recess, 10: bonding needle, 11: adhesive, 12: slit, 13: connection reinforcing material, 14 : Window, 15: Protective sleeve, 16: Connection groove, 17: Opening and closing shaft, 18: Fixed band, 19a, 19b: Bent part, 20: Tapered part.

Claims (10)

An optical fiber connection device for connecting optical fibers,
A connection tool comprising at least a guide hole for inserting an optical fiber and a connection groove for abutting optical fibers inserted through the guide hole;
An optical fiber connection device comprising at least an adhesive portion that fixes an optical fiber inserted through the connection instrument. The optical fiber connection device according to claim 1, wherein the connection instrument includes a bonding hole and / or a slit for conducting the exterior and the bonding portion. The optical fiber connecting device according to claim 1 or 2, wherein the connection groove has a circular or V-shaped cross section. The optical fiber connecting device according to any one of claims 1 to 3, wherein the connection groove has bent portions at both ends or one end thereof. The optical fiber connecting device according to any one of claims 1 to 4, wherein the connection groove includes a connection reinforcing material provided with a V groove or a V groove. In addition to the above
A protective sleeve for covering the entire connection device together with the optical fiber fixed in abutment manner, or a fixing band for fixing a part of the connection device, or an adhesive or tape for covering only the gap of the connection device. The optical fiber connection device according to any one of 1 to 5. An optical fiber connection device for connecting optical fibers,
A connection reinforcing material disposed so as to be separable in the connection groove of the connection device including at least a guide hole for inserting the optical fiber and a connection groove for abutting the optical fibers inserted through the guide hole;
An adhesive portion for fixing the optical fiber inserted through the connection tool to the connection reinforcing material;
A protective sleeve that covers the whole of the connection reinforcing material together with the optical fiber that is fixed in contact with each other, or a fixing band that fixes a part of the connection reinforcing material, or an adhesive or tape that covers only the gap of the connection reinforcing material. An optical fiber connecting device. An optical fiber connecting device assembling method according to any one of claims 1 to 5,
After inserting the first optical fiber from one of the guide holes of the connection tool into the connection groove, it is fixed with an adhesive part,
Insert the second optical fiber from the other guide hole into the connection groove,
After assembling the first and second optical fibers, the second optical fiber is fixed by an adhesive portion. An assembly method for an optical fiber connection device according to claim 6,
After inserting the first optical fiber from one of the guide holes of the connection tool into the connection groove, it is fixed with an adhesive part,
Insert the second optical fiber from the other guide hole into the connection groove,
After abutting the first and second optical fibers, the second optical fiber is fixed with an adhesive portion,
A method for assembling an optical fiber connecting device, comprising: covering a fixed optical fiber together with a connecting device with a protective sleeve, a fixing band, an adhesive, or a tape. An assembly method for an optical fiber connecting device according to claim 7,
After inserting the first optical fiber from one of the guide holes of the connection tool into the connection groove in which the connection reinforcing material is disposed, it is fixed to the connection reinforcing material at the adhesive portion,
Insert the second optical fiber from the other guide hole into the connection groove,
After butting the first and second optical fibers, the second optical fiber is fixed to the connection reinforcing material at the bonding portion,
A method of assembling an optical fiber connecting device, comprising: separating an optical fiber fixed in abutment together with a connection reinforcing material from a connection device; and covering the optical fiber together with the connection reinforcing material with a protective sleeve, a fixing band, an adhesive, or a tape.

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