JPS62121410A - Storage body for optical fiber core connection part - Google Patents

Abstract

PURPOSE:To facilitate operation for taking in an out an optical fiber connection part and an excessive-length core by constituting a frame coupling body formed by linking circular mandrels by plural coupling tools and running the circular mandrels through a couple of holes formed in each of storage sheets. CONSTITUTION:A storage sheet 12 is provided with a folding part 13a at one side of its long side, a U-shaped bent part 13b on the opposite long side, and holes 12a at both ends of the long side on the side of the folding part 13a. A circular mandrel 11 is provided with a coupling and separating function to enable the storage sheet 12 to be mounted on the circular mandrel 11 of the frame coupling body. The excessive-length core 3 is arrayed elliptically while held to a permissible radius of curvature, the storage sheet on the side of the bent part 13b and adjacent storage sheet 12 are expanded to insert the bundled side of only the excessive-length core 3 into the folding part 13a provided to the storage sheet 12 from the outer periphery, and the bundled side of a connection part 4 and the excessive-length core 3 is put in the belt part 13b.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a structure for accommodating an optical fiber connecting portion and an extra length of the optical fiber in a connecting portion of an optical cable.

(Prior Art) Conventionally, as shown in FIGS. 9 to 12, this type of storage structure for optical fiber connectors has a structure in which another is placed on one side of a rectangular plastic substrate sheet 5. A plurality of storage sheets 7 are provided, each of which is made up of a plurality of divided sheets 6 made of rectangular plastic sheets, each standing upright in parallel at a corner at a certain distance. The storage sheets were curved so as to have a cylindrical shape, and assembled so that the outer shape was cylindrical as a whole, and the assembled storage sheets were stored inside a cylindrical storage sheet fixture 8. The storage sheet fixing tool 8 is a section 3a that is obtained by dividing the circumference of one cylinder into several equal parts around the center point parallel to the long axis.

8b, 8c, 8d as a hinge tool 9 having a hinge function
(Patent application No. 60-169867)
issue).

Because of this structure, the position for inserting and removing the extra length fiber and the connection part is inside the cylinder, and when working to insert and remove the extra length fiber and the connection part, it is necessary to disassemble the entire optical fiber core housing. Often, when performing connection work in a narrow space such as a manhole, it requires a large work space, making it difficult in some cases, or even if it can be performed, it has the disadvantage of poor work efficiency. .

(Problems to be Solved by the Invention) An object of the present invention is to provide an optical fiber splicing portion storage body that allows the operation of inserting and removing the optical fiber splicing portion and the extra-length core wire easily.

(Means for Solving the Problems) The present invention constitutes a frame assembly in which circular mandrels in which both ends of one round bar are connected to each other are opposed, and the circular mandrels are connected to each other by a plurality of connectors. , the circular mandrel is passed through a pair of holes provided in each of the plurality of storage sheets for storing the optical fiber cable connection portion and the extra length fiber, and the outer shape of the plurality of storage sheets as a whole is cylindrical. Stack them as shown.

The fixing position and fixing method of the storage sheet that stores the optical fiber splicing part and the extra length core differs from the conventional optical fiber splicing part storage body. In order to store the wires, it was necessary to dismantle the storage body and store the optical fiber connection part and the extra length of the fiber.However, the present invention can store the optical fiber in a cylindrical shape without disassembling the storage body. The collected storage bodies can be stored from the outer circumferential direction.

Further, the present invention provides the circular mandrel and the optical fiber core in order to facilitate the work of storing the extra-length fiber core and the connecting portion in the storage portion on the opposite side to the work side where the optical fiber fiber-coated wire connecting portion and the extra-length fiber core are stored. The frame assembly consisting of the connector may be provided with a rotation function capable of rotating in the circumferential direction of the circular mandrel, and such an optical fiber cable connection part storage body is not available in the prior art.

There are two ways to configure the rotation function of the present invention: one is to provide it on the outside of the cylindrical storage body, and the other is to provide it inside the cylindrical storage body. Specific examples are shown below.

The first embodiment is a specific example in which the rotation function is provided outside the cylindrical storage body, and is shown in FIGS. 1 to 3.

Fig. 1 is a perspective view of the entire storage body according to the present invention, Fig. 2 is an enlarged sectional view taken along line A-A' in Fig. 1, and Fig. 3 is a perspective view of the frame assembly. Identical components are represented by the same reference numerals. In other words, 1 is an optical cable, 2
3 is an optical fiber core, 3 is an extra length core, and 4 is a connecting portion, for example, a connecting tube.

10 is a connector, 11 is a circular mandrel, 12 is a storage sheet, 1
3a is a folding part, 13b is a bending part, 14 is a fixture,
15 is a notch.

In the first embodiment, a frame assembly as shown in FIG. 3 is constructed, a circular mandrel 11 is passed through a hole 12a provided in a storage seam 2 as shown in FIG. 4, and an optical fiber core is inserted. It constitutes a connection part storage body. - In FIG. 3, circular mandrels 11 each having both ends of a round bar connected to each other are placed opposite each other,
It is fixed to two connectors 10 bent into a flank shape, and the connectors 10 are fitted into a notch 15 provided in the fixture 14 to form a frame assembly of the optical fiber core connection section. are doing. This can be easily fitted into the connector 10 and the notch 15 by using the elastic behavior of the connector 10.

FIG. 4 shows the structure of the storage sheet 12 according to the embodiment of the present invention, with a folding portion 13a on one long side, a U-shaped bent portion 13b on the opposite long side, and a folding portion 13a on the opposite long side. Holes 12a are provided at both ends of the long sides.

Storage sheet 1 on the circular mandrel 11 of the above-mentioned frame combination body
2 can be installed by either providing a connection/separation function in the part where both ends of the round rod are connected to each other on the circular mandrel 11, or 1. Or hole 12a from the folding part 13a side provided in storage sheet 12.
This is possible by providing slits towards the front, allowing you to attach as many storage sheets as you need.

Next, a method for storing the optical fiber connecting portion and the extra length will be explained with reference to FIG.

First, the extra length core wire 3 is aligned in an elliptical shape while maintaining the allowable radius of curvature, and the connection portion 4 and the extra length core wire 3 are constrained on the side of the connecting portion 4, and the extra length core wire 3 is on the opposite side. only in bundles. The space between the storage sheet on the bending part 13b side of the storage sheet 12 on the working side attached to the cylindrical optical fiber connector storage body and the storage sheet next to it is expanded, and the space is expanded in the outer circumferential direction. The side where only the extra length core wires 3 are bundled is first inserted into the folding section 13a provided in the storage sheet 12, and the side where the connecting section 4 and the extra length core wires 3 are tied is stored in the bent section 13b. .

Next, in the upper half of the storage sheet on the opposite side to the work side where the optical fiber fiber connection part and the extra length fiber are stored in the cylindrical storage body,
To store the extra length core wire 3 and the connection part 4, rotate the connector 10 by 90 degrees from the upper side, and to store it in the lower half storage sheet, rotate the connector 10 by 90 degrees from the lower side. The storage sheet is set on the working side, and the extra length core wire 3 and the connecting portion 4 are stored in the same manner as described above.

Note that by providing a large number of notches in the fixture 14, it is also possible to enable precise rotation.

The second embodiment is a specific example in which the rotation function is provided inside the cylindrical storage body, and is shown in FIGS. 6 to 8.

In this embodiment, the optical fiber connector housing rotates around the fixed shaft 17 using the housing fixing cylinder 16 and the fixed shaft 17.

As shown in FIG. 6, grooves 18 for inducing rotation are provided in the storage body fixing cylinder 16 to face each other in the longitudinal direction, and rectangular storage sheet dividing plates 19a, 19b, and 19c are provided.

19d are storage sheet dividing plates 19a, 19b, 19
c and 19d, each long side is parallel to the long axis of the storage body fixing tube 16, and is provided upright at a position that equally divides the circle of the cross section of the storage body fixing tube 16 into four. A circular mandrel 11 is fixed to the opposite short sides of the storage sheet dividing plates 19a, 19b, 19c, and 19d on the side of the storage body fixing cylinder 16, and protrusions 20 are provided at both ends of the fixed shaft 17 to stop rotation.
are provided facing each other, and the protrusion 20 is structured to be fitted into a groove 18 provided in the storage body fixing tube 16. is the same as in the first embodiment.

(Effects of the Invention) As explained above, the optical fiber splicing part storage body of the present invention has a cylindrical aggregate structure for storing and taking out the optical fiber splicing part and the extra length. There is no need to dismantle the assembly, and the extra-length fiber bundle with the smaller constraint width is inserted first, and the connection between the optical fiber cable connection part with the larger constraint width and the extra-length fiber bundle is carried out from the outer circumferential direction of the optical fiber. Since the structure is such that the bundle is stored later, there is an advantage that the optical fiber connecting portion and the extra length can be easily stored and cut out even in a narrow manhole.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the first embodiment, and Fig. 2 is A-A in Fig. 1.
A sectional view at A', FIG. 3 is a configuration diagram of the frame assembly of the first embodiment, FIG. 4 is a perspective view of the storage sheet, and FIG. Explanatory diagrams of the method, FIGS. 6 to 8 show the second embodiment, and the sixth embodiment
7 is a perspective view showing the structure of the storage body fixing tube, FIG. 8 is a perspective view of the fixing shaft, FIGS. 9 to 12 show the prior art, and FIG. FIG. 9 is a perspective view of a conventional optical fiber connection part storage structure, FIG. 10 is a sectional view taken along line B-B' in FIG. 9, FIG. 11 is a perspective view of a conventional storage sheet assembly, and FIG. 12 FIG. 1 is a perspective view of a conventional storage seat fixing device. ■...Optical cable 2...Optical fiber core wire 3
...Extra length core wire 4...Connection part ・5...
・Substrate sheet 6...Divided sheet 7.12...
・Storage sheet 8...Storage sheet fixing tool 8a, 8
b, 8c, 8d... Section 9... Hinge lO
... Connector 11 ... Circular mandrel 12 ...
・Storage sea) 12a... Hole 13a... Folding part 13b... Bent part 14... Fixing tool
15... Notch portion 16... Storage body fixing cylinder 17... Fixed shaft 18... Grooves 19a, 19b, 19c, 19d... Storage sheet dividing plate. 20... Protrusion Fig. 5 Fig. 6 Fig. 8 Fig. 9

Claims (1)

[Scope of Claims] 1. A frame assembly is constituted by opposing circular mandrels in which both ends of one round bar are connected to each other, and the circular mandrels are connected to each other by a plurality of connectors, and an optical fiber core wire connection part 1 provided on each of the multiple storage sheets that store the extra length core wires.
An optical fiber cable connection part storage body, characterized in that the circular mandrel is passed through a pair of holes, and the plurality of storage sheets are stacked in a cylindrical shape. 2. In the optical fiber cable connection unit storage body according to claim 1, the frame assembly consisting of the circular mandrel and the connector is provided with a mechanism capable of rotating in the circumferential direction of the circular mandrel. An optical fiber core connection unit storage body characterized by: