JP3344947B2 - Adhesive injection jig and method of assembling optical fiber connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber connector located between transmission lines of an optical fiber and used for switching or cutting the transmission line, for injecting an adhesive into an optical fiber insertion hole. The present invention relates to an adhesive injection jig.

[0002]

2. Description of the Related Art When an optical fiber and an optical fiber core are fixed to a ferrule assembled to an optical fiber connector, an adhesive is generally used, and the adhesive is applied to a housing of the optical fiber connector. Conventionally, an adhesive injection jig has been used to inject the ferrule into the optical fiber insertion hole or the optical fiber core wire insertion hole through the through hole. The conventional adhesive injection jig is a tapered injection tube, and the adhesive injection jig is inserted into the base end of the adhesive injection jig with the tapered portion inserted into the optical fiber insertion hole of the optical fiber connector. It is mounted, and the adhesive is injected into the optical fiber insertion hole from the adhesive injector via an adhesive injection tube. After the adhesive has been injected into the optical fiber insertion hole, the adhesive injection jig is pulled out, the optical fiber is inserted into the optical fiber insertion hole, and the optical fiber core is inserted into the optical fiber core insertion hole. It is fixed.

For example, Japanese Patent Laid-Open No.
Japanese Unexamined Patent Publication (Kokai) No. 327854/1993 discloses an example. The "adhesive injection jig" disclosed in this publication is a cylindrical member that fits into the rear end of the ferrule, the cylindrical member is fitted into the rear end of the ferrule, and the syringe is injected from the tail of this cylindrical member. The needle is inserted to inject the adhesive into the rear part of the ferrule.

[0004]

However, in the adhesive injection jig made of such a tapered injection tube, an adhesive adheres to the tip after use, and the tapered injection tube penetrates the housing when reused. When the optical fiber connector is inserted into the optical fiber insertion hole through the hole, the adhesive adhered to the tip adheres to a portion of the optical fiber connector other than the adhesive injection point in the optical fiber connector, such as the entrance of the through hole of the housing and the inside thereof, and adheres. When the optical fiber is inserted after the agent is injected, the optical fiber may be adhered to the optical fiber connector by an adhesive, resulting in a defective assembly.

Also, in the conventional "adhesive injection jig" disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 8-327854, after the adhesive is injected into the rear part of the ferrule, the cylinder is inserted from the rear end of the ferrule. When the member is removed, the adhesive adheres to the tip of the cylindrical member, and again, when the cylindrical member is fitted into the rear end of the ferrule, the adhesive attached to the tip adheres to the rear end of the ferrule, Failure to assemble the optical fiber occurs.

For this reason, the adhesive injection jig must be disposable, which increases the production cost of the optical fiber, and the adhesive injection jig is cleaned after use, but the workability is poor. was there. SUMMARY OF THE INVENTION The present invention solves such a problem, and prevents an adhesive from being attached to an unnecessary portion even if it is used many times, and eliminates the need for an adhesive cleaning operation, thereby assembling an optical fiber. It is an object of the present invention to provide an adhesive injection jig with improved easiness.

[0007]

According to a first aspect of the present invention, there is provided a first insertion hole into which an optical fiber formed in a front portion can be inserted, and a communication with the first insertion hole. A ferrule formed at the rear portion and having a second insertion hole larger in diameter than the first insertion hole, and a housing portion including the ferrule and having a through hole communicating with the rear of the second insertion hole. And an adhesive for fixing the optical fiber and an optical fiber core wire having the optical fiber at the distal end to the first insertion hole and the second insertion hole. The adhesive injection jig for injecting the adhesive from the second insertion hole has an adhesive injection part at a base end capable of injecting the adhesive, and an adhesive can be injected into the second insertion hole at the distal end. Adhesive injection tube with a A concealing position that includes at least the distal end portion of the adhesive injection tube and has a shape that can be inserted into at least the rear portion of the through hole of the housing portion, and the injection hole is concealed, and the injection hole protrudes forward. And a biasing means interposed between the cylindrical guide and the adhesive injection pipe to bias the adhesive injection pipe toward the concealing position. An adhesive injection jig characterized in that:

According to a second aspect of the present invention, in the adhesive injection jig of the first aspect, when the cylindrical guide is inserted into the through hole, the cylindrical guide is positioned on the concealing position side and the adhesive injection pipe is provided. Of the cylindrical guide, the distal end of the cylindrical guide is restricted from further insertion by the rear end of the ferrule in the through hole of the housing portion, and the inlet is inserted into the second insertion hole. The adhesive injection jig moves to the projecting position when inserted.

According to a third aspect of the present invention, in the adhesive injection jig of the first aspect, the cylindrical guide is provided with a small-diameter portion at the tip end capable of being fitted into the through-hole and after insertion into the through-hole is regulated. When inserted into the through-hole, the cylindrical guide is located on the concealing position side and conceals the injection port of the adhesive injection tube, but the injection port is the second port. The rear end large-diameter portion is locked by the housing and moves to the projecting position when inserted into the insertion hole.

According to a fourth aspect of the present invention, there is provided the adhesive injection jig of any one of the first to third aspects, wherein the adhesive injection portion at the base end of the adhesive injection tube is provided with an adhesive injection. An adhesive injection jig is provided with an injection tube insertion hole into which an injection tube of a container can be inserted. According to a fifth aspect of the present invention,
In the adhesive injection jig according to the first aspect, the adhesive injection section at the base end of the adhesive injection pipe has a shape attachable to an injection syringe of an adhesive injector. In the adhesive injection jig.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of an adhesive injection jig according to a first embodiment of the present invention, FIG. 2 is a sectional view of the adhesive injection jig and an optical fiber connector, and FIGS. FIG. 4 is an explanatory view of an assembling method of the optical fiber connector.

First, the structure of the optical fiber connector will be described. As shown in FIG. 2, an optical fiber 01 (FIG. 4 (
c) is fixed to the cylindrical body 13 having the optical fiber insertion hole 13a.
It is configured by fitting a tubular member 14 having an optical fiber insertion hole 14a and a flange 14b to which (see FIG. 4C) is fixed. And this ferrule 12
A compression spring 15 is mounted on the outer peripheral portion of the tubular member 14 in FIG. 1, and a plug frame 16 is fitted on the outside thereof so as to cover the compression spring 15. That is, the compression spring 15 is connected to the ferrule 12 with respect to the plug frame 16.
Is held forward, and the ferrule 12 can be retracted by a predetermined amount. A plug housing 17 that can be connected to an adapter (not shown) is mounted outside the plug frame 16.

In this ferrule 12, the cylindrical body 13
The diameter of the rear portion of the optical fiber insertion hole 13a is
3b is formed, and the optical fiber insertion hole 14a of the tubular member 14 communicates with the enlarged diameter portion 13b. Further, the rear end of the tubular member 14 is inserted into the optical fiber insertion hole 14.
The cylindrical portion 1 having an optical fiber loose insertion hole 14c larger in diameter than the optical fiber insertion hole 14a and communicating with the optical fiber insertion hole 14a.
4d. The cylindrical portion 14d is fitted into an optical fiber insertion hole 16a formed in the plug frame 16, and the optical fiber core wire loose fitting hole 14c is fitted into the optical fiber insertion hole 1c.
6a.

Therefore, as will be described later, the optical fiber insertion hole 1
An adhesive is injected into the optical fiber insertion hole 3a and the optical fiber insertion hole 14a, the optical fiber 01 inserted from the optical fiber insertion hole 16a is fixed to the optical fiber insertion hole 13a, and the light inserted from the optical fiber insertion hole 16a. Fiber core wire 0
2 is fixed in the optical fiber insertion hole 14a. The adhesive injection jig 20 according to the present embodiment for injecting an adhesive into such an optical fiber connector plug 11 is shown in FIGS.
As shown in FIG.
And a compression coil spring 41 as urging means interposed between the cylindrical guide 21 and the adhesive injection pipe 31. ing.

The cylindrical guide 21 has a small-diameter cylindrical portion 22 having a small diameter on the front end and a large-diameter cylindrical portion 23 having a large diameter on the rear end. A reduced-diameter portion 24 is provided on the inner surface of the rear end of the large-diameter cylindrical portion 23. Is formed. The adhesive injection pipe 31 has a disk-shaped flange 32 integrally formed at the base end thereof, and an injector mounting hole 33 into which an injection pipe 03 of an adhesive injector (not shown) can be mounted. On the other hand, an adhesive injection hole 34 having a diameter smaller than that of the injector mounting hole 33 is formed at the distal end side of the adhesive injection tube 31 so as to communicate with the injector mounting hole 33. An injection port 35 for discharging the agent is formed. A ring-shaped locking portion 36 is formed on the outer peripheral portion of the adhesive injection tube 31. When the adhesive injection tube 31 is inserted into the cylindrical guide 21, the locking portion 36 has a large diameter. It is movable within the cylindrical portion 23 and the amount of movement is regulated by the small-diameter cylindrical portion 22 and the reduced-diameter portion 24.

A compression coil spring 41 is mounted on the outer peripheral portion on the base end side of the adhesive injection tube 31, and one end is formed on the flange portion 32.
, And the other end is pressed against the end face of the reduced diameter portion 24 of the cylindrical guide 21. Accordingly, the amount of movement of the adhesive injection pipe 31 is restricted by the small-diameter cylindrical portion 22 and the reduced-diameter portion 24 within the large-diameter cylindrical portion 23 of the cylindrical guide 21 so that the locking portion 36 moves as shown in FIG. a) and as shown in FIG.
5 is concealed in the cylindrical guide 21 and FIG.
2 (b) and FIG. 2 (b), the injection port 35 is movably supported at a protruding position which projects forward and is exposed to the outside. Usually, the adhesive injection pipe 31 is moved by the urging force of the compression coil spring 41 as shown in FIGS. 1 (a) and 2 (a).
As shown in (2), when the locking portion 36 comes into contact with the reduced diameter portion 24, the injection port 35 is biased and held at the concealed position.

The small-diameter cylindrical portion 22 of the cylindrical guide 21 has the optical fiber insertion hole 16 of the optical fiber connector plug 11.
When the distal end surface abuts on the end surface of the cylindrical portion 14d, the amount of insertion can be restricted, and a predetermined length can be inserted (cylindrical guide restricting portion). Furthermore, when the cylindrical guide 21 is inserted into the optical fiber insertion hole 16a of the optical fiber connector plug 11, the movement of the small-diameter cylindrical portion 22 is regulated by abutting against the rear end surface of the cylindrical portion 14d. Further, when the adhesive injection pipe 31 is moved forward against the urging force of the compression coil spring 41, the injection port 35 is moved.
Project forward from the cylindrical guide 21, and the locking portion 36 abuts on the rear end surface of the small-diameter cylindrical portion 22 of the cylindrical guide 21, or the tapered tip portion has an optical fiber core insertion hole 14 a in the optical fiber connector plug 11. By contacting the slanted portion 14e of the fiber and the core wire loose fitting hole 14c, the protrusion amount is regulated, and the optical fiber core wire fitting hole 14a can be fitted into the optical fiber core fitting hole 14a by a predetermined length (injection pipe regulating portion).

Here, the adhesive injection jig 20 of the present embodiment is used.
A method of assembling the optical fiber connector plug 11 using the above will be described. First, as shown in FIG. 3A, the optical fiber insertion hole 16a of the optical fiber connector plug 11 is formed.
Small diameter cylindrical portion 2 of cylindrical guide 21 of adhesive injection jig 20
2 is inserted, and the distal end surface is brought into contact with the end surface of the cylindrical portion 14d, whereby the movement is restricted, and the insertion is performed by a predetermined length. At this time, the distal end face of the large-diameter cylindrical portion 23 is inserted into the optical fiber insertion hole 16a.
May be designed so that the movement is regulated by first contacting the opening.

Next, as shown in FIG. 3B, by pressing the flange 32 of the adhesive injection tube 31 against the urging force of the compression coil spring 41, the injection port 35 is moved to the cylindrical guide 2
The adhesive injection pipe 31 at the concealed position concealed in the inside 1 is moved forward, and the locking portion 36 comes into contact with the end surface of the small-diameter cylindrical portion 22 of the cylindrical guide 21, or the tip portion is inclined.
e, the adhesive injection tube 31 is fitted into the optical fiber insertion hole 14a by a predetermined length.

In this state, as shown in FIG. 3C, the injection pipe 03 of the adhesive injector is inserted from the rear into the injector mounting hole 33 of the adhesive injection pipe 31, and the adhesive is injected from the injection pipe 03. When the adhesive 04 is injected into the tube 31, the adhesive 04 passes through the adhesive injection hole 34 and is discharged from the injection hole 35 into the optical fiber core wire insertion hole 14a. The adhesive 04 reaches the optical fiber insertion hole 13a from the optical fiber insertion hole 14a, and the optical fiber insertion hole 14a and the optical fiber insertion hole 13a.
A predetermined amount is injected into a.

As shown in FIG. 4A, a predetermined amount of the adhesive 04 is applied to the optical fiber insertion hole 14a and the optical fiber insertion hole 13a, that is, the optical fiber insertion hole 14a.
Is injected to about 80%, the adhesive injection tube 31 is retracted to the concealing position where the injection port 35 is concealed in the cylindrical guide 21 by the urging force of the compression coil spring 41. Subsequently, while the injection port 35 is located at the concealed position in the cylindrical guide 21, as shown in FIG. 4B, the adhesive injection jig 20 (the cylindrical guide 21) is inserted through the optical fiber insertion hole 16 a of the optical fiber connector plug 11. Remove 21). Therefore, the adhesive adhered to the injection port 35 is removed together with the injection port 35 by the cylindrical guide 2.
Since it is pulled out while being held in the inside 1, the adhesive does not adhere to the inner surface of the optical fiber insertion hole 16a.

Thereafter, as shown in FIG. 4C, the optical fiber 01 and the optical fiber core wire 02 are inserted into the optical fiber insertion hole 1.
6a, the optical fiber is inserted into the optical fiber connector plug 11, the optical fiber 01 is inserted into the optical fiber insertion hole 13a, and the optical fiber core wire 02 is inserted into the optical fiber insertion hole 14a. As described above, in the method of assembling the optical fiber connector plug 11 using the adhesive injection jig 20 according to the present embodiment,
By mounting the adhesive injection jig 20 with the adhesive injection tube 31 in the cylindrical guide 21 and allowing the injection port 35 to move freely between a concealed position where the injection hole 35 is concealed within the cylindrical guide 21 and a protruded position where the injection hole 35 projects forward. When the adhesive injection jig 20 is mounted on the optical fiber connector plug 11, the injection port 35 is concealed in the cylindrical guide 21, and after mounting, the adhesive 35 projects forward against the urging force of the compression coil spring 41, and the adhesive is injected. 04 can be injected into the optical fiber insertion hole 13a, and after the adhesive 04 is injected,
Again, the cylindrical guide 21 of the adhesive injection jig 20 is removed from the optical fiber connector plug 11 while the injection port 35 is hidden inside the cylindrical guide 21.

Therefore, even if the adhesive 04 adheres to the injection port 35 of the adhesive injection tube 31, the injection port 35 is concealed in the cylindrical guide 21. 04 does not adhere to the inner surface of the optical fiber insertion hole 16a or the like. Further, even if the adhesive injection tube 31 is used again without cleaning, the adhesive does not adhere to the opening and the inner surface of the optical fiber insertion hole 16a at the time of insertion, and the optical fiber connector plug 11 Assembly failure can be prevented.

FIG. 5 is a sectional view of an adhesive injection jig according to a second embodiment of the present invention, and FIGS. 6 and 7 are explanatory views of a method of assembling an optical fiber connector using the adhesive injection jig. Note that members having the same functions as those described in the above-described embodiment are denoted by the same reference numerals, and redundant description will be omitted. In the above-described embodiment, an example in which the ferrule is incorporated in a plug housing such as a commonly used ST type, SC type, or FC type is described. However, in this embodiment, the pre-assembly is performed before the ferrule is incorporated in the plug housing. A method for assembling the general-purpose connector plug described above will be described as an example.

As shown in FIG. 5 (a), in the optical fiber connector 51 of the present embodiment, the ferrule 52 includes an optical fiber core wire insertion hole 54a and a flange member 54b in a cylindrical body 53 having an optical fiber insertion hole 53a. Tubular member 5 having
4 is fitted. A compression spring 55 is attached to the outer peripheral portion of the ferrule 52,
A stop ring 56 is fitted outside the compression spring 55 so as to cover the compression spring 55.

In the ferrule 52, the rear portion of the optical fiber insertion hole 53a is enlarged to form an enlarged diameter portion 53b.
An optical fiber insertion hole 54a communicates with the enlarged diameter portion 53b, and a cylindrical portion 54d having a fiber core insertion hole 54c is formed at the rear end thereof via an inclined portion 54e. The cylindrical portion 54d is fitted into an optical fiber insertion hole 56a formed in the stop ring 56, and the fiber core wire loose fitting hole 54c is in communication therewith. In this embodiment, the outer peripheral surface of the cylindrical portion 54d has a locking projection 54f, which engages with the reduced-diameter portion 56b of the cylindrical tube 56 that is slidably fitted in the tubular member 54 in the axial direction. As a result, it is preassembled. The optical fiber plug 51 configured as described above has an outer shape that can be fitted to a plug housing of SC type, FC type, ST type, or the like as it is pre-assembled. Connectable.

The adhesive injection jig 60 includes a cylindrical guide 61, an adhesive injection pipe 71 movably mounted in the cylindrical guide 61 along the axial direction, a cylindrical guide 61 and the adhesive injection pipe. And a compression coil spring 81 as urging means interposed therebetween. Cylindrical guide 6
Reference numeral 1 denotes a small-diameter tubular portion 62, a large-diameter tubular portion 63, and a reduced-diameter portion 64. The adhesive injection tube 71 is integrally formed with an injector fitting cylinder 72 to which an injection syringe 05 of an adhesive injector (not shown) can be attached at the base end, and an injector connecting hole 73 is formed. ing. On the other hand, the adhesive injection pipe 71
An adhesive injection hole 74 communicating with the injector connection hole 73 is formed on the distal end side of the nozzle, and an injection hole 75 for discharging the adhesive is formed by tapering the outer peripheral portion of the distal end. A locking portion 76 is formed on the outer peripheral portion of the adhesive injection tube 71. The locking portion 76 is movable within the large-diameter cylindrical portion 63, and
The amount of movement is regulated by the small-diameter cylindrical portion 62 and the reduced-diameter portion 64.

A compression coil spring 81 is mounted on the outer peripheral portion on the base end side of the adhesive injection tube 71, and has one end mounted on the injector fitting cylinder 7.
2 and the other end thereof is in contact with the end face of the reduced diameter portion 64 of the cylindrical guide 61. Accordingly, the adhesive injection pipe 71 is not shown in FIG.
As shown in FIG. 5 (b), the injection port 75 is concealed in the cylindrical guide 61, and as shown in FIG. 5 (c), the injection port 75 projects forward and is exposed to the outside. It is movably supported and is normally biased and held at the concealed position by the biasing force of the compression coil spring 81, as shown in FIG. 5 (b).

Here, the adhesive injection jig 60 of the present embodiment is used.
A method of assembling the optical fiber connector 51 using the method will be described. First, as shown in FIG. 6A, the injection syringe 05 of the adhesive injector is attached to the injector fitting cylinder 72 of the adhesive injection pipe 71 of the adhesive injection jig 60, and in this state,
The small-diameter cylindrical portion 62 of the cylindrical guide 61 of the adhesive injection jig 60 is inserted into the optical fiber insertion hole 56a of the optical fiber connector 51.

Next, as shown in FIG. 6B, the adhesive injection pipe 71 is pressed together with the injection syringe 05 against the urging force of the compression coil spring 81, and the injection port 75 is moved into the cylindrical guide 61.
The adhesive injection tube 71 at the concealed position concealed inside is moved forward, and the tip end is inserted into the optical fiber core insertion hole 54a. In this state, as shown in FIG. 6C, the injection connection hole 7 of the adhesive injection tube 71 is formed by the injection syringe 05.
When the adhesive 04 is injected into the optical fiber core 3, the adhesive 04 passes through the adhesive injection hole 74 and enters the optical fiber core insertion hole 5 through the injection hole 75.
4a. The adhesive 04 reaches the optical fiber insertion hole 53a from the optical fiber insertion hole 54a and is injected in a predetermined amount.

As shown in FIG. 7 (a), when a predetermined amount of the adhesive 04 is injected into the optical fiber insertion hole 54a and the optical fiber insertion hole 53a, the adhesive injection tube 71 is connected to the compression coil spring 81. The injection port 75 is retracted to a concealed position where the injection port 75 is concealed in the cylindrical guide 61 by the urging force. Subsequently, while the injection port 75 is located at the concealed position in the cylindrical guide 61, as shown in FIG. 7B, the adhesive injection jig 60 is inserted through the optical fiber insertion hole 56a of the optical fiber connector 51.
(Cylinder guide 61) is extracted.

Then, as shown in FIG. 7C, the optical fiber 01 and the optical fiber core wire 02 are inserted into the optical fiber insertion hole 5.
6a, the optical fiber 01 is inserted into the optical fiber insertion hole 53a, and the optical fiber core wire 02 is inserted into the optical fiber insertion hole 54a.
Each is fixed with an adhesive 04. Therefore, even in the present embodiment, even if the adhesive 04 adheres to the injection port 75 of the adhesive injection pipe 71, the injection port 75 is
1, the adhesive 04 does not adhere to the inner surface of the optical fiber insertion hole 56a or the like at the time of extraction as described above. Further, even if the adhesive injection pipe 71 is used again without cleaning, the adhesive does not adhere to the opening and the inner surface of the optical fiber insertion hole 56a at the time of insertion, and the optical fiber connector plug 51 Assembly failure can be prevented.

[0033]

As described above, according to the adhesive injection jig of the present invention, even if the adhesive adheres to the injection port of the adhesive injection pipe, it can be inserted and withdrawn when the adhesive is attached. The injection port is concealed in the cylindrical guide, the adhesive does not adhere to the through-holes in the housing, etc., and can be reused without cleaning the adhesive injection pipe. Can be prevented from being defectively assembled.

[Brief description of the drawings]

FIG. 1 is a perspective view of an adhesive injection jig according to a first embodiment of the present invention.

FIG. 2 is a sectional view of an adhesive injection jig and an optical fiber connector.

FIG. 3 is an explanatory view of a method of assembling an optical fiber connector using an adhesive injection jig.

FIG. 4 is an explanatory diagram of a method of assembling an optical fiber connector using an adhesive injection jig.

FIG. 5 is a sectional view of an adhesive injection jig according to a second embodiment of the present invention.

FIG. 6 is an explanatory diagram of a method of assembling an optical fiber connector using an adhesive injection jig.

FIG. 7 is an explanatory diagram of a method of assembling an optical fiber connector using an adhesive injection jig.

[Explanation of symbols]

 01 Optical fiber 02 Optical fiber core wire 03 Adhesive injection tube 04 Adhesive 05 Injection syringe 11, 51 Optical fiber connector 12, 52 Ferrule 13a, 53a Optical fiber insertion hole 14a, 54a Optical fiber insertion hole 14c, 54c Fiber core play Fitting hole 15, 55 Compression spring 16 Plug frame 17 Fastening member 21, 61 Cylindrical member 31, 71 Adhesive injection tube 32, 72 Flange 35, 75 Inlet 41, 81 Compression coil spring (biasing means) 56 Stop ring

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-219007 (JP, A) JP-A 8-327854 (JP, A) JP-A 10-48463 (JP, A) 85307 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) G02B 6/36-6/40

Claims (17)

(57) [Claims] A first insertion hole formed at a front portion of the first insertion hole, into which an optical fiber can be inserted; and a first insertion hole formed at a rear portion in communication with the first insertion hole and having a diameter larger than that of the first insertion hole. A first insertion hole for an optical fiber connector including a ferrule having two insertion holes and a plug frame or a stop ring which is a housing having a through hole communicating with the rear of the second insertion hole. And an adhesive injecting jig for injecting an adhesive for fixing the optical fiber and an optical fiber core wire having the optical fiber at the distal end into the second insertion hole from the second insertion hole. An adhesive injection tube having an adhesive injection portion capable of injecting the adhesive at an end portion, and having an injection hole capable of injecting an adhesive into the second insertion hole at a distal end portion; At least the tip is included A cylinder having a shape that can be inserted into at least the rear part of the through hole with the housing part, and that is movably provided at a concealing position at which the inlet is concealed and at a projecting position at which the inlet protrudes forward. And a biasing means (41) interposed between the cylindrical guide (21) and the adhesive injection pipe (31) to bias the adhesive injection pipe toward the concealing position. An adhesive injection jig characterized by the above-mentioned. 2. The adhesive injection jig according to claim 1, wherein the cylindrical guide is located on the concealing position side when the jig is inserted into the through hole, and conceals the injection port of the adhesive injection pipe. The distal end of the cylindrical guide is further restricted by the rear end of the ferrule in the through hole of the housing portion, and when the inlet is inserted into the second insertion hole, An adhesive injection jig that moves to a protruding position. 3. The adhesive injection jig according to claim 1, wherein the cylindrical guide has a front-end small-diameter portion that can be fitted into the through-hole and a rear-end large-diameter portion that is restricted from being inserted into the through-hole. However, when the cylindrical guide is inserted into the through hole, the cylindrical guide is positioned on the concealing position side to conceal the injection port of the adhesive injection tube, but when the injection port is inserted into the second insertion hole. Wherein the rear end large diameter portion is locked to the housing and moves to the projecting position. 4. The adhesive injection jig according to claim 1, wherein an injection pipe of an adhesive injector is provided at the adhesive injection section at a base end of the adhesive injection pipe. An adhesive injection jig provided with an insertable tube insertion hole. 5. The adhesive injection jig according to claim 1, wherein the adhesive injection section at a base end of the adhesive injection pipe is
An adhesive injection jig having a shape mountable to an injection syringe of an adhesive injector. 6. An optical fiber formed in the front part can be inserted.
A first insertion hole, and a rear portion communicating with the first insertion hole.
And a second insertion having a larger diameter than the first insertion hole.
A ferrule having a hole;
Plug frame, which is a housing part having a through hole through which it passes
Fiber optic connector with system or stop ring
The adhesive is injected from the second insertion hole into the
An adhesive injection jig having a base end portion having an adhesive injection portion capable of injecting the adhesive, and a distal end portion having an injection hole capable of injecting the adhesive into the second insertion hole. Injection pipe, A cylindrical guide that includes at least the tip end of the adhesive injection pipe, and is movably provided at a concealed position where the injection port is concealed and a projected position where the injection hole projects forward. An adhesive injection jig, comprising: an urging means interposed between the cylindrical guide and the adhesive injection pipe to urge the adhesive injection pipe toward the concealing position. 7. The cylindrical guide has a small-diameter cylindrical portion at a tip end side.
And a large-diameter cylindrical portion having a larger diameter than the small-diameter cylindrical portion on the rear end side,
Having a reduced diameter portion on the inner surface of the large diameter cylindrical portion,
The adhesive injection jig according to claim 6 . 8. The cylindrical guide is provided in the second insertion hole.
Plug frame having a through-hole provided in communication with the rear
Or through the through hole of the stop ring or
The tip of the small-diameter cylindrical portion of the cylindrical guide is
Rear end of the lock restricts insertion into the ferrule
Adhesive injection jig according to claim 6, characterized in that it is. 9. A tip of the small-diameter cylindrical portion of the cylindrical guide.
The end portion of the large-diameter cylindrical portion is in contact with an opening of the through hole of the plug frame or the stop ring having a through hole provided in communication with the rear of the second insertion hole.
Adhesive injection jig according to claim 6, wherein the insertion into the ferrule, characterized in that it is regulated by. 10. An outer peripheral portion of the adhesive injection tube,
By the rear end face of the small-diameter cylindrical portion and the reduced-diameter portion, the adhesive
The adhesive injection jig according to claim 6, further comprising a locking portion for regulating a movement amount of the injection pipe . 11. The adhesive injection tube , wherein the injection port is:
Provided in a tubular member provided at the rear end of the ferrule
Optical fiber core fixing fixed optical fiber core
And an optical fiber core communicating with the optical fiber core wire insertion hole.
Connect the optical fiber cable with a larger diameter than the wire insertion hole.
By contacting the inclined portion, the adhesive injection hole
The adhesive injection jig according to claim 6 , wherein the amount of protrusion into the ferrule is regulated . 12. The adhesive injection pipe is bonded to a tip end side.
An injector mounting hole to which an injection tube of the agent injector can be mounted;
And has a smaller diameter than the injector mounting hole.
The adhesive injection jig according to claim 6 , further comprising an adhesive injection hole . 13. The adhesive injection tube according to claim 13, wherein a base end of the adhesive injection tube is provided with an adhesive.
The adhesive injection jig according to claim 6, wherein the jig has a shape attachable to an injection syringe of the injector . 14. The adhesive injection tube is provided at a proximal end thereof.
Pressing the adhesive injection tube against the urging force of the urging means
7. An adhesive injection jig according to claim 6, wherein a flange portion is formed integrally . 15. An adhesive injection jig according to claim 6, wherein said urging means is a compression coil spring . 16. An optical fiber formed at the front part can be inserted.
A first insertion hole that is operable, and
The second insertion hole formed in the portion and having a diameter larger than the first insertion hole.
A ferrule having an inlet, and a ferrule behind the second insertion hole.
A plug frame, which is a housing having a through hole communicating therewith,
Fiber optic connector with
An adhesive capable of injecting the adhesive at the base end portion with respect to the
While having an injection part , adhered to the second insertion hole at the tip
An adhesive injection tube having an injection port through which an agent can be injected;
Including at least the tip of the adhesive injection tube,
The concealed position where the inlet is concealed and the injection hole protrudes forward
And a cylindrical guide movably provided at the projected position
Cylindrical adhesive of the adhesive injection jig of the adhesive injection jig provided
Insert the id to the second insertion hole of said ferrule, said adhesive injection port protrudes to the protruding position of the injection port, from said inlet to eject adhesive into the ferrule, said inlet is the Back to the position where it is hidden in the cylindrical guide
And remove the adhesive injection jig from inside the ferrule.
And inserting the optical fiber into the first insertion hole and the second insertion hole.
And an optical fiber core with the optical fiber at the tip.
Optical fiber connector set characterized by inserting and fixing
Standing method. 17. A method for discharging an adhesive from an adhesive injection jig.
The adhesive was discharged from the entrance into the optical fiber connector
After that, in the optical fiber connector in a state where the injection port is concealed.
Pull out the adhesive injection jig from the
17. The method for assembling an optical fiber connector according to claim 16, wherein the fiber core is inserted into and fixed to the optical fiber connector.