JPS6051807A - Housing method of optical fiber connection part - Google Patents

Abstract

PURPOSE:To fix an optical fiber to a connection part projection tool in an excellent state wherein a connection part has no shearing stress by operating a tensile force applying part and testing the tensile force of the connection part after a tensile force testing device is detached from a welding device. CONSTITUTION:The welding device 7 is provided with a couple of optical fiber presser bases 9 which have V grooves in top surfaces on the axial lines of a couple of bases 10. Then, the terminal parts of an optical fiber 1a and an optical fiber 1a and an optical fiber 1b to be connected together are fixed with pressure plates 9a of optical fiber bases 9. Then, a couple of electrode rods 8 are put closer to the connection part and the fibers are welded together by arc discharge. The tensile force testing device 11 is detached from the welding device 7 and an eccentric pin 24 is operated to test the tensile strength of the connection part 2. Consequently, the optical fibers are fixed to the connection protecting tool in the excellent state wherein the connection part has no shearing force.

Description

Detailed description of the invention (a) Technical field of the invention
, 2. Concerning the carrying capacity method of optical fiber connection parts when installing two.

(b) Technical background How to use subj as a permanent connection means for light soars and f-bars? j,
and 1.8. The fusion method has the advantage that the connection part does not deteriorate over time, there is little connection loss, and the shape of the connection part is small or the time required for continuation is short, so it is more widely used than the later Ff. <It has been implemented. However, heating strips ('l
Since the tensile strength of the connected portion may decrease depending on the condition, it is desirable to conduct a tensile strength test at a predetermined tension of 200 to 300 g after welding.

1) Since the coating has been peeled off from the connection part, it is necessary to protect the connection part and provide reinforcement.

FIG. 1 is a perspective view of an example of connection portion protection.

In the same figure, optical fiber 18 and optical fiber 11
) means that the coating of each terminal part is
The end surfaces thereof are brought into contact and fused to form a core connection section 24.

3 is a connection part protector made of a long prismatic metal material, and the coating including the connection part 2 of the optical fiber 1a and the optical fiber 1b is peeled off and a part is inserted at the center line of the soil surface. For example, a connecting portion insertion groove 4 is formed which is sealed with silicone 4A (grease).

Insert the connection part again/? ? At both ends of i4, there are formed ends i5 into which the coated portions of the optical fibers 1a and 1b are inserted and fixed with adhesive.

After installing the optical fiber connected to the connection protector 3 as described above, protect the connection fjJl! A cover 6 made of a metal plate is fitted onto the upper surface of U3. This fitting means includes bending both edges of the cover [j to provide opposing clamping side plates 6a, and inserting the clamping side plates 6a into notch grooves 3a formed on both sides of the connecting portion protector 3. ,
It is clamped to the connection portion protector 3 by the elasticity of the clamping side plate 6a.

In this manner, the connecting portion of the optical fiber is attached to the connecting portion protector, and the coated portion of the optical fiber having a strong tensile strength is firmly fixed to the protector. Even if a tensile force of 1 is applied to the optical fiber, the tensile force ε, 1
The connection part protector is designed to prevent negative damage to the connection part.

(C) Prior art and problems The conventional method for accommodating optical fiber connections involves inserting and fixing the end portions of each optical fiber into Vl+Vj of a fusion splicing device, aligning the ζ axis -L, and fusing them. After that, remove the optical fiber from the fusion splicing device and apply a predetermined tension to the optical fiber connection using the appropriate -1 step! A tensile strength test is being conducted. The non-defective products that were not cut under the predetermined tensile force are housed and fixed in a connection protector as shown in FIG.

However, with this method, the connection is protected in a state different from the state in which the optical fibers are fused, that is, in a state in which the axes of the two optical fibers are aligned but are twisted! There is a high possibility that it will become stuck within t3. If it is fixed in a twisted state, a negative shear stress of 4:7 will be applied to the welded surface, which may cause the welded surface to break or break over a long period of time, even if it is not possible. A part of the optical fiber is shifted and a gap is created between the 11 planes of the optical fiber, causing an increase in loss of contact.

(d) Object of the Invention An object of the present invention is to provide a method for accommodating an optical fiber connection part, which eliminates the above-mentioned conventional problems.

(e) Structure of the Invention To achieve this object, the present invention provides a tensile force testing device which is mounted in a U-shape at both ends of the coupling part and clamps the respective optical fibers by means of springs. A pair of holding parts are attached to one end of the connecting part 44, and one of the holding parts is moved and tightened in the axial direction of the optical fiber by means of a spring means. The tensile force test device is equipped with a tensile force applying unit that applies a tensile force of After clamping the optical fiber between the holding parts and removing the tensile force testing device from the fusion splicing device, a tensile force test was performed on the spliced part by operating the tensile force applying part.
'i i'ill 'Insert V1, connect the connection part lJ recitation 1 ((λ; 1j μ only connection GiC part l++'
It is designed to be housed and fixed in place 7.

(f) Embodiments of the Invention The present invention will now be described with reference to the illustrated embodiments.
I will explain it to you. Note that the same name indicates the same object throughout the figures.

Fig. 2 shows an embodiment of the present invention, (a) is a perspective view of the tensile force testing device, (b) is a sectional view taken along the dotted line M-M of the housing 14, and (c) is the tensile force test device. K in the dotted line N-N section of Attachment 1-i part
The i-side view and FIG. 3 are perspective views of the connector 11.5 accommodated in the connector protector.

In FIG. 2, the tensile force test device II is installed at both ends of the prismatic connecting part shrine 12 in a shape of 12 downwards.
is installed. The holding portion I3 is provided with a hole +32 that passes horizontally through the holding portion main body 14, and a fixing bar 15 is inserted into this hole 13a.

A tab is formed on one of the teeth of the clamping bar 15, and a rectangular plate-shaped clamping piece 18 having a width approximately equal to the Ir stop is formed on the other 01!1 surface of the clamping bar 15. is fixed perpendicular to the axis. Hole 13 into which the clamping hole \-15 is loosely fitted
In a, a compression coil spring 19 is installed on the outer periphery of the tip 1 of the clamping bar 15 so as to press the clamping bar 15 in the pinching direction. Further, a key-shaped groove 16 is formed on the outer circumferential surface of the clamping bar 15 at a position closer to the knob than the compression coil spring 19, with one groove part parallel to the axis. S1
The hesopper pin 17 is inserted into the hole of the holding cloth main body 14, and the tip protruding into the hole +3a is fitted into the key-shaped groove IG.

When the clamping bar 15 is pushed in the direction of the closing piece I8 against the elasticity of the compression coil spring 19 and rotated 90 degrees so that the clamping piece 1'+'l8 is in a horizontal direction, a key-shaped groove is formed. The tip of the stopper pin 17, which had been loosely fitted into the axial groove 16, slides within the key-shaped groove 16 and moves to the groove perpendicular to the axial center. Therefore, even if the finger pressing the clamping bar 15 is released, the clamping bar 15 does not return to the state before it was pushed in, and the optical fiber remains between the vertical side surface of the main body 14 and the clamping piece 18.
Maintain a gap that is sufficiently larger than the straight line (lock).

In addition, the clamping bar 15 is rotated so that the clamping piece 18 faces downward.
When it is turned 90 degrees 1111, the clamped piece \-X5 returns to its original position due to the elasticity of IL Tsumugi 21 Ia 1 and spring I9, and the clamped piece 18
is moved so as to be pressed against the vertical side surface of the main body 14 of the f1 roller section r4'. However, during this period, if the optical fiber \- is placed in a water condition, the optical fiber 1b will be fixed. Note that the pressing force of the compression coil spring 19 to press the optical fiber <-1b is 4; l: 30 (l v, or more). is the desired strength.

Also, the C-holding section 1 installed at the other end of the series K1'□ section 12 is used to settle the other connected optical fiber. 1. It is composed of sea urchins.

The holding cloth main body 14 of one holding part 13 is fixed to the end of the connecting member 12 with a screw 7 as shown in (I'I), but the holding cloth main body 14 of the other holding part 13 is ), the tensile force (() is attached to the °ζ connecting part frame 12 via the J cylinder part 20.

A recess 21 is provided on the lower surface of the end of the connecting member 12 and is perpendicular to the axis of the connecting member 12 . The rod-shaped G/F1 bar 22 is inserted into the insertion hole at the end of the connecting member 12.
i, rJ the four parts 21 parallel to the axis of the connecting member 12
The threaded part at the tip is fixed by pivoting into the threaded hole in the four side walls. The upper end surface of the holding cloth main body 14 has a concave portion 2I.
is inserted into the recess 21 so as to be in close contact with the bottom wall surface of the
The guide bar 22 loosely fits the two parts IInjffirL and is attached to the connecting member 12. Therefore, the holding part I3 is guided by the guide bar 22 and the connecting part + AI
can be slid in a direction parallel to the axis of the two.

A retaining groove 23 that is perpendicular to the guide bar 22 is formed at the upper end of the retaining cloth body. Retaining groove 2 of connecting member 12
An eccentric pin 24 is rotatably mounted at a position corresponding to 3, and an eccentric protrusion 25 is formed at the lower end portion of the eccentric pin 24 that is inserted into the engagement groove 23. Further, a compression coil spring 26 is attached to the outer periphery of the threaded portion of the guide bar 22 to constantly press the holding portion main body 14 in the opposite direction to the other holding portions 13. The pressing force of this compression coil spring 26 is adjusted to a predetermined pressure of 200 to 300 g.

Therefore, the eccentric pin 2 protruding from the first plane of the connecting member 12
Rotate the head knob 4 to connect the eccentric protrusion 25 to the connecting member 12.
Position on the center side: W;-t! When L is closed, engagement tIi 23
1119+'Xt' L, 1 on the center side of the connecting member I2 of
Pressed by the eccentric protrusion 25, the holding cloth main body 14, i.e. (>;1
．． The 5 part 13 resists the elasticity of the compression coil spring 26 and moves in the direction approaching the other fixed holding part 13 and locks therein.
Maintain that state.

When the eccentric bottle 24 is rotated by 180 degrees, the eccentric protrusion 25 moves twice the amount of eccentricity or to the opposite side with respect to the axis of the eccentric bottle 24. Therefore, the engagement between the eccentric pin 24 and the Cλ two-holding portion main body 14 is released, and the compression coil spring 26 is disposed in the holding portion I3.
The predetermined elasticity of is determined. In this case, if the clamping piece 18 does not hold the optical fiber, the holding part 13 will move in the direction away from the other holding part 13. However, the clamping piece 18
is sandwiching the optical fiber, and unless the tensile force corresponding to the elasticity of the compression coil spring 2 Ei is applied to the optical fiber by negative 1;η and the optical fiber connection is not severed, (^
The holding part 13 does not move. That is, the tensile force (;I''5 part 20 is tJ5t ('+
Jul.

The figure indicated by the dotted line in Fig. 2 (a) is the fusion splicing device i! i'7. Vice: Connection equipment “7 is a pair of units 10
An optical fiber holding stand 9 with a VIR formed on two sides is installed on the axis of the optical fiber. Strip the coating on the ends of the optical fibers 1a and 1b to be connected, align the ends of each optical fiber i' with the grooves of the optical fiber holder 9, abut the end faces, and align the axes. It is fixed on the back using the holding plate 9a of the optical fiber holding stand 9. Then, bring a pair of electrode rods 8 close to the connection part -B
Tighten and arc discharge to fuse.

Optical fiber 1a and optical fiber 11) -:l? I!
RF and fixed to the optical fiber holding stand 9, the lower part of the main body 14 of each holding part 13 is placed on the upper surface of the pair of stands 10, and the tensile strength testing apparatus 11 is rotated seven times. After that, the ends of the optical fibers 1a and 1b are sandwiched between the clamping pieces 18 of the respective holding parts 13,
To stretch the connected optical fibers without twisting.

With the optical fiber attached to the tensile force testing device 11 in this way, remove the tensile force testing device 11 from the fusion splicing device 7, and then operate the eccentric pin 24 as described above.
Perform tensile strength test.

If the IfL tension test results in a good product, the eccentric pin 24 is rotated to remove the tensile force applied to the optical fiber connection part 2 while being held by the clamping bar I8.

After that, as shown in Fig. 3, attach the connecting part protector 3 to the upper part of the connecting part protector 31, and align the axis on both sides of the joint part protector mounting stand 3J. Each holding part 13 of the tension/IK force trial production apparatus 1 is placed on top of a pair of tensile strength test apparatus support stands 30 installed in the same manner as shown in FIG.

Each time the tensile force testing device 11 is attached to the holder, the connecting portion 2 of the reflective saw bar is inserted into the connecting portion insertion groove 4 of the connecting portion protector 3. Therefore, optical fiber 1 a
and the coating part of the optical fiber 1b, and the groove 5 of 3, which protects the connection part.
Moreover, each optical fiber can be fixed to the connection part protection 3 in a state similar to a fused state without twisting.

(g) DETAILED DESCRIPTION OF THE INVENTION As described, the present invention not only enables tensile strength testing of optical fiber connections 91 to be carried out in a convenient manner;
This is a method for accommodating an optical fiber connection part that has excellent practical effects, such as being able to fix the connection part to a connection part protector in a good state without shearing stress in the connection part.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an example of a connecting part protector, Fig. 2 is a perspective view of an embodiment of the present invention, (a) is a perspective view of a tensile force testing device, and (b) is a portion of the holding part lined with dotted line M-M. (C) is a cross-sectional view of the point i6t N-N of the tensile force applying part, and Fig. 3 is an oblique view when the connecting part is protected and housed. I,! It is 1. In the figure, 1a and Ib are optical fibers, 2 is a connection part, 3 is a connection part protector, 7 is a fusion splicing device, 8 is an electrode rod, 11 is a tensile force testing device, 12 is a connecting member, 13 is a holding part, 15 19.2 (i is a compression coil spring, 20 is a tensile force ("J" i section, 22 is a force rod f and 1

Claims (1)

[Claims] The tensile force test device includes a pair of holding parts that are attached to both ends of a connecting member in a shape of 21 and clamp the end portions of each optical soaring device using spring means, and a pair of holding parts that are attached to one end of the connecting member and that hold the end portions of the respective optical soar wires in place using spring means. a tensile force applying part that applies a predetermined tensile force to the connecting part of the optical fiber by moving the holding part in the axial direction of the optical fiber by a spring means,
Place the tensile force testing device on the fusion splicing device.
The 01!1 end of each of the optical fibers is clamped between the holding parts in a tensioned state of 2r n-'j, and after removing the tensile force test device from the sub-1 shield 1 concatenating device, the tensile force test device is Power (1
Perform a tensile force test on the connecting part by operating the connecting part, and with the optical fiber of good quality held in the holding part, insert the connecting part into the connecting part insertion groove of the connecting part protector and tighten the 11 pin J. - A method for accommodating an optical fiber connection part, characterized in that: