JPS5932983Y2 - Optical fiber surplus length processing bobbin - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a bobbin for processing extra length of optical fiber at the optical fiber connection section.

In the prior art, in FIG. 1, 10 is the bobbin body, 12 is the outer collar, and 1
4 is an extra length processing portion, 16 is an inner rib, 18 is a connecting portion accommodating portion, and 20 is a support arm.

30 is an optical fiber cable, and its fiber core 3
2, the extra length 320 is wound in an oval loop shape within the extra length processing portion 14 and wound around the bobbin body 10.

34 is a connection part.

A groove 40' is provided in the outer flange 12, and a groove 50' is provided in the inner flange 16, in which the fiber core 32 is accommodated and properly held so as not to come off. .

OBJECT OF THE INVENTION When connecting unit-type optical fiber cables, it is an object of the present invention to facilitate the processing of fiber cores for each unit at once.

Example Figure 2 shows an elevation view.

10 is a bobbin body, which is made of a cylinder made of metal such as aluminum.

12 is the outer brim, 14 is the extra length processing part, 16 is the inner brim, 1
Reference numeral 8 denotes a connecting portion accommodating portion, and the outer diameter of this portion is slightly smaller than the outer diameter of the extra length processing portion 14.

Note that this embodiment is a case of a bobbin for processing the extra length of a 48-core (6-core unit x 8) cable, and the support arm 20 is not shown.

The outer collar 12 is made of elastic rubber such as nitrile rubber.

The grooves 40 are provided, for example, at positions that divide the circumference into eight equal parts (FIG. 3).

For example, it is square, as shown in the enlarged view in Figure 4.
A tongue-like lid 42 extends from one side to the opposite side 4.
It protrudes towards 6 and blocks the entrance.

Further, the outer surface 48 of the lid 42 is sloped toward the tip to facilitate insertion of the fiber core 32.

The area below the lid 42 is large enough to accommodate one unit of fiber cores 32, for example six fibers, arranged in three rows and two tiers.

The inner collar 16 is also made of elastic rubber, such as nitrile rubber.

The groove 50 has a narrow width and an angle, as shown in Figures 5 and 6.
For example, the size is such that the fiber cores 32 can be accommodated in one row and two stages in the radial direction.

Further, the entrance is provided with protrusions 52 on both sides and is narrowed to less than the diameter of one fiber core 32 .

In this way, two fiber cores 32 are placed in one groove 50.
If there are 6 pieces in 1 unit, when inserting
The receiver has one unit of 0's.

How to use this bobbin (1) First, bring the fiber core wires 32 to the fusion splicer and fusion splice them. After the splicing, connect the fiber core wires 32 on both sides of the splicing part 34 into the grooves in the inner brim 16. Push it within 50.

In this case, since the protrusion 52 exists, the fiber core 32 will not come off.

Similarly, if two fiber core wires 32 are pushed into each of the three rows of grooves 50, one unit, that is, six
The book connecting parts 34 are fixed on the connecting part accommodating part 18 in three rows and two stages.

In this case, as described above, since the outer diameter of the connecting portion accommodating portion 18 is smaller than the outer diameter of the extra length processing portion 14, the connecting portion 34 does not particularly protrude.

(2) When the fiber core wires 32 for one unit have been connected as described above and the connecting portions 34 have been fixed, the six fiber core wires 32 for one unit are assembled and attached to the outer flange.
Push it into the groove 40 of 2.

In this case, the fiber core wires 32 do not escape because of the cover 42. At this time, it is not necessary to arrange the six fiber core wires 32 in particular numerical order, but the fiber core wires 32 are elastic, and the fibers in the grooves 40 are Since the core wires 32 can be accommodated in three rows and two stages, the six core wires may spread out or intersect extremely between the adjacent inner ribs 16 and outer ribs 12. Things will go away.

(3) The processing of the extra length 320 is the same as the conventional method.

However, in this case, six pieces of one unit are processed simultaneously.

Effects of the invention (1) Since the groove 50 of the inner brim 16 is elongated and can accommodate the fiber cores 32 stacked in multiple stages in the radial direction, the connecting portions 34 can be accommodated in multiple stacks as described above. can.

Therefore, compared to the case where the connection parts 34 are arranged in one row, a large number of connection parts 34 can be processed with the thin bobbin body 10,
Also, as mentioned above, it becomes easier to group one unit into three rows and two tiers and create a small gap between adjacent units.

(2) Even if the connecting portions 34 are stacked in multiple stages, the connecting portion accommodating portion 1
Since the outer diameter of the connecting portion 8 is smaller than the outer diameter of the extra length processing portion 14, it is possible to prevent the connecting portion 34 from becoming particularly thick.

(3) Since the groove 40 is large enough to accommodate one unit of the fiber core 32, the fiber core 32 for one unit can be pushed in all at once, making the work easier.

Furthermore, as described above, when arranging the fiber cores 32 in three rows and two tiers in the groove 50 of the inner brim, the groove 40 of the outer brim should also be shaped so that the fiber cores 32 can be accommodated in three rows and two tiers. If this is done, the fiber cores 32 will not be extremely spread out or intersected between the adjacent inner ribs 16 and outer ribs 12, but will be lined up together.

(4) At the entrance of the groove 40, a tongue-shaped lid 42 protrudes from one side to the opposite side 46 and blocks the population, so there is not much room below the lid 42. Even if you do not have enough space (if you do not have enough space, use the fiber
When one unit of fiber core wires 32 is pushed in all at once, the fiber cores 32 are pushed in in order from the one that entered first, so that all of them can be inserted without getting stuck.

On the other hand, if the lid 43 were to protrude from both sides and be pushed in from the center as shown in Figure 7, if there was not much room under the lid 43, it would be necessary to There is a risk of getting stuck.

(5) As described above, it is very convenient to process the fiber core wires 32 for unit (1) all at once.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of a conventional optical fiber surplus length processing bobbin.
FIG. 2 is an elevational view of this invention, and its llll-■II and ■-■ cross sections are shown in FIGS. 3 and 5. Further, an enlarged view of the groove 40 is shown in FIG. 4, and an enlarged view of the groove 50 is shown in FIG. FIG. 7 shows a groove different from that of the present invention, and is an explanatory diagram to show that such a shape is inconvenient. 10...Bobbin body, 12...Outer rib, 14...Excess length processing part, 16...Inner rib, 18...Connection Department storage part, 32...
...Fiber core wire, 34...Connection part, 40...
... Groove, 42 ... Lid, 50 ...
- Groove, 52...protrusion.

Claims (1)

[Claims for Utility Model Registration] Two outer flanges 12 are provided on the outer surface of the elongated cylindrical bobbin main body 10 at an appropriate interval, and the space between them is an extra length processing portion 14. Two inner flanges 16 are provided at an interval, and the space between them is used as a connecting portion accommodating portion 18. Grooves are provided in each of the outer rib 12 and the inner rib 16, and the fiber core wire 32 is provided therein. In the optical fiber surplus length processing bobbin that holds, the outer collar 12 and the inner collar 16 are made of elastic rubber, and the groove 40 provided in the outer collar 12 is large enough to accommodate one unit of fiber core wire 32. and at the entrance thereof, a tongue-shaped lid 42 protrudes from between at least one side toward the opposite side 46 to block the opening, and a groove 50 provided in the inner brim 16 However, the fiber core 32 is elongated and can accommodate multiple layers of fiber cores 32 stacked in the radial direction, and a protrusion 52 is provided at the entrance, thereby making the entrance narrower than the diameter of one fiber core. An optical fiber surplus length processing bobbin characterized in that: the outer diameter of the connection portion accommodating portion 18 is smaller than the outer diameter of the surplus length processing portion 14.