JPH11326722A - Diameter expanding tool for optical cable termination treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To expand the diameter of an optical cable terminal and to improve the workability of the termination treatment of an optical cable and coated optical fiber identifiability by forming a circular diameter expanding hole inclined in a radial direction at a piece of a sectorial shape in plane shape and forming a cutting slit succeeding to the diameter expanding hole from the short side part or long side part of the piece. SOLUTION: The diameter expanding grooves 3 of nearly half circular shape in sectional shape are divergently formed at, for example, 7 points on the peripheral surface 2a of a disk 2 having a truncated cone shape. A circular through-hole 4 is formed at the central part of the disk 2 therewith and the cutting slit 5 succeeding to the through-hole 4 is formed from the peripheral surface 2a of the disk 2. The diameter expanding grooves 3 are required to be formed by divergently inclining the grooves. In using the diameter expanding tool 1 for the termination treatment of the optical cable, the tape winding part of the central slot is inserted into the through-hole 4 in such a manner that the cutting slit 5 is forcibly expanded and that the inclination of the diameter expanding grooves 3 diverges toward the front end of the multislot optical cable. The tape winding parts of the outer periphery slots are then fitted into the diameter expanding grooves 3 to expand the diameter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical cable terminal processing expander used for terminal processing of an optical cable such as a multi-slot optical cable, and more particularly, to expanding the diameter of each slot unit of an optical cable such as a multi-slot optical cable. The present invention relates to an optical cable terminal processing diameter expander that can improve processing workability and optical fiber core wire discrimination.

[0002]

2. Description of the Related Art With the increase in the number of optical fiber cables (hereinafter referred to as optical cables), for example, as shown in FIG.
Multi-slot optical cables having a plurality of slot-type units (hereinafter, referred to as slots) accommodating a large number of optical fiber tapes or optical fiber tapes (hereinafter, referred to as optical fibers) are being adopted.

The multi-slot optical cable 40 includes a center slot 41, seven outer slots 42 gathered on the outer peripheral surface of the center slot 41, a holding tape 43 wound on the slot assembly, and Filler 44 filled between holding tape 43 and each slot
And a jacket 45 formed on the holding tape 43. The center slot 41 includes a slot rod 47 having a plurality of grooves 46 formed on the outer peripheral surface thereof, a tension member 48 disposed at the center of the slot rod 47, and a plurality of slots housed in the groove 46 of the slot rod 47. The outer peripheral slot 42 includes an optical fiber 49 and a holding tape 50 wound on the slot rod 47. The outer peripheral slot 42 has a plurality of groove portions 51 formed on the outer peripheral surface, and a center of the slot rod 52. A plurality of optical fibers 54 housed in the groove 51 of the slot rod 52;
Holding tape 5 wound on slot rod 52
And 5.

[0004] Such a multi-slot optical cable 40
In the terminal processing such as the connection between the terminals and the termination of the terminal, the work of cutting the center slot 41 and the outer peripheral slot 42, the work of processing the tension members 48 and 53, the work of identifying the optical fibers 49 and 54, the work of identifying the optical fibers 49 and 54, and the like. When the connection operation of the central slot 42 is performed, a large number of optical fibers 54 pulled out from the outer peripheral slot 42 become obstacles.
Will interfere with the terminal processing work. In particular, if the optical fiber is 3
In the terminal processing of an ultra-multi-core multi-slot optical cable accommodated in 000 fibers or more, the terminal processing operation of the center slot becomes considerably difficult. In addition, when reconnecting, branching, or relocating an optical cable after installing the connection or termination of the ultra-multi-core multi-slot optical cable on the optical closure or termination, the identification of the optical fiber in the center slot is not possible. Almost impossible.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an optical cable capable of expanding the diameter of an optical cable terminal such as a multi-slot optical cable and improving the workability of terminal processing of the optical cable and the discrimination of the optical fiber. An object of the present invention is to provide a terminal processing diameter expanding tool.

[0006]

The object of the present invention is to form a divergent groove having at least one semi-circular cross section on the peripheral surface of a circular plate and to form a circular groove at the center of the circular plate. The above problem is solved by a diameter increasing tool for processing an optical cable terminal in which a through hole is formed and a cut is made from the peripheral surface of the disk to the through hole. In addition, a planar shape is a fan-shaped piece, a donut-shaped optical cable terminal processing diameter expanding device formed by grouping a plurality of pieces so that the short side of the piece is located inside, the piece is inclined in the radial direction. The problem is solved by an optical cable terminal processing expanding tool in which a circular expanding hole is formed, and a cut is made from the short side or the long side of the piece to the expanding hole.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of an optical cable terminal processing device according to the present invention.
The present invention is not limited to the following embodiments.

(Embodiment 1) FIG. 1 is a diagram showing an embodiment of an optical cable terminal processing expanding tool according to the present invention. The diameter expanding device 1 for processing an optical cable terminal has, on a peripheral surface 2a of a disk 2 having a truncated conical shape, an expanded groove 3 having a substantially semicircular cross-sectional shape formed at seven places in a divergent shape. A circular through hole 4 is formed at the center of the
5 is formed.

The material of the disk 2 may be any material that can expand the slit 5 by elastic deformation.
For example, ethylene-propylene-diene copolymer (EP
DM), rubber materials such as silicone and urethane, and plastic materials. Above all, EPDM is preferable in consideration of characteristics such as elasticity. The thickness and diameter of the disk 2 are set according to the outer diameter, the number of cores, and the like of the optical cable to be expanded. Although not particularly limited, for example, in the case of a multi-slot optical cable of 3000 cores, The length is 10 to 30 mm, the diameter of the bottom surface of the truncated cone is 40 to 60 mm, and the diameter of the top surface of the truncated cone is 50 to 70 mm. Note that the shape of the disk 2 is not limited to a truncated cone, and may be, for example, a columnar shape, a polygonal plate shape, or the like.

The number of the diameter-enlarging grooves 3 is determined by the number of outer peripheral slots accommodated in the multi-slot optical cable whose diameter is expanded, and is not particularly limited to seven places. When two or more enlarged diameter grooves 3 are formed,
It is preferable that each of the diameter-enlarging grooves 3 is formed at a position on the circumference of the disk 2 that is equally spaced around the circumference. The diameter of the semicircular cross section of the diameter-enlarging groove 3 is set by the diameter of the outer peripheral slot of the multi-slot optical cable whose diameter is expanded, and is not particularly limited. For example, in the case of a 3000-core multi-slot optical cable, The radius is between 6.5 and 8.5 mm.

Further, it is necessary that the diameter-enlarging groove 3 is provided so as to be inclined in a divergent shape. The inclination angle is, for example, in the range of 15 to 45 ° with respect to the center axis of the disk 2. If the inclination angle is less than 15 °, the diameter of the multi-slot optical cable terminal cannot be sufficiently increased. If the inclination angle exceeds 45 °, the bending angle of the expanded outer peripheral slot becomes too large. It adversely affects transmission characteristics and the like.

The diameter of the through hole 4 is determined by the diameter of the center slot of the multi-slot optical cable whose diameter is to be increased, and is not particularly limited.
In the case of the multi-slot optical cable having 00 fibers, the radius is 8 to 11 mm. The width of the slit 5 is not particularly limited, but is, for example, 0 to 2 mm.

Next, this optical cable terminal processing expanding tool 1 will be described.
How to use will be described. FIG. 2 is a schematic diagram showing a procedure of a method of expanding the diameter of a 3000-slot multislot optical cable. First, the jacket 11 of the multi-slot optical cable 10 is peeled off from the terminal to a position of about 900 mm, and the central slot 12 and the outer peripheral slot 13 are exposed. As shown in FIG.
mm polyvinyl chloride tape (hereinafter referred to as PVC tape) is wound to provide a tape winding portion 14.

Next, an optical cable terminal processing expanding tool 1 is prepared. The slit 5 of the optical cable terminal treatment expanding tool 1 is pushed and expanded, and as shown in FIG. 2B, the inclination of the expanding groove 3 becomes wider toward the tip end of the multi-slot optical cable 10 so as to expand toward the center. The tape winding portion 14 of the slot 12 is inserted into the through hole 4, and the tape winding portion 14 of the outer peripheral slot 13 is fitted in the diameter-enlarging groove 3 to increase the diameter.

Then, as shown in FIG. 2 (c), the peripheral surface and the outer peripheral slot 13
After the PVC tape 15 is wound thereon and the optical cable terminal processing expanding tool 1 and the outer peripheral slot 13 are fixed, the holding tape 16 of the center slot 12 and the outer peripheral slot 13 ahead of the optical cable terminal processing expanding tool 1 is removed. The optical fiber 17 and the tension member 18 are exposed by stripping and cutting a slot rod (not shown).

Next, a method of connecting the multi-slot optical cable 10 and a method of storing the same in the optical closure will be described. First, as shown in FIG.
The multi-slot optical cable 10 whose diameter has been enlarged and the optical fiber 17 is exposed is connected to the end face plate 2 of the optical closure 20.
2 and the tension member 18 is fixed with the tension member grip 23. Next, the optical fibers 17 are connected to each other, and the connection portion of the optical fibers 17 is connected to the core wire storage article 2.
Store in 4. After the connection of the optical fiber 17, the closure sleeve 21 is attached, and the multi-slot optical cable 10 is connected.
Of the connection portion into the optical closure 20 is completed.

Such an optical cable terminal processing expanding tool 1
Since the central slot 12 of the multi-slot optical cable 10 is fixed by the through hole 4 at the center and the outer peripheral slot 13 around the central slot 12 is expanded by the large-diameter groove 3, the optical fiber of the central slot 12 17 is easy to identify and connect. Further, even after the connection portion of the multi-slot optical cable 10 is stored in the optical closure 20,
Since the optical cable terminal processing expander 1 is attached, the identification work of the optical fiber 17 in the reconnection, branching, trouble transfer, etc. of the multi-slot optical cable 10 can be performed.
Connection work and the like can be easily performed.

(Embodiment 2) FIG. 4 and FIG. 5 are views showing an embodiment of an optical cable terminal processing expanding tool according to the present invention. The optical cable terminal processing diameter expanding device 30 is a donut-shaped member formed by assembling seven pieces 31 each having a fan shape in a plane shape such that the short sides 32 thereof are located inside. Circular enlarged hole 33 inclined in the radial direction
Is formed, and a cut 34 is formed from the short side portion 32 of the piece 31 to the enlarged diameter hole 33.

The size of the optical cable terminal processing expanding tool 30 is set by the outer diameter of the optical cable to be expanded, the number of core wires, and the like, and is not particularly limited.
In the case of a multi-slot optical cable having 000 fibers, the thickness is 10 to 30 mm, the diameter of the donut-shaped expander is 60 to 100 mm, and the donut formed by gathering the short sides 32 is formed. The diameter of the central hole 35 of the diametrically widening tool is 16 to 22 mm.

The number of the pieces 31 is determined by the number of outer peripheral slots accommodated in the multi-slot optical cable whose diameter is increased, and is not particularly limited to seven. The material of the piece 31 may be any material that can expand the slit 34 by elastic deformation, and examples thereof include rubber materials such as EPDM, silicon, and urethane, and plastic materials. Above all, EPDM is preferable in consideration of characteristics such as elasticity.

The diameter of the diameter-enlarging hole 33 is set by the diameter of the outer peripheral slot of the multi-slot optical cable whose diameter is expanded, and is not particularly limited.
In the case of a multi-slot optical cable having 000 fibers, its diameter is 6.5 to 8.5 mm. In addition, the above-described enlarged hole 3
3 needs to be provided to be inclined in the radial direction of the sector.
The inclination angle is, for example, the optical cable terminal treatment expanding tool 3.
It is in the range of 15 to 45 ° with respect to the central axis of 0. If the inclination angle is less than 15 °, the diameter of the multi-slot optical cable terminal cannot be sufficiently increased. If the inclination angle exceeds 45 °, the bending angle of the expanded outer peripheral slot becomes too large. It adversely affects transmission characteristics and the like. The width of the slit 34 is not particularly limited, but is, for example, 0 to 2 mm. In addition, the division is
The piece 31 may be formed so as to continue from the long side of the piece 31 to the enlarged diameter hole 33.

Next, the optical cable terminal processing expanding tool 3 will be described.
How to use 0 will be described. First, as in the case of the first embodiment, the jacket of the multi-slot optical cable is peeled off from the terminal to a position of about 900 mm, the central slot and the outer peripheral slot are exposed, and about 25 m from the cable jacket end.
A PVC tape having a width of 10 mm is wound around the center slot and the outer peripheral slot m.

Next, the optical cable terminal processing expanding tool 30 is used.
Prepare Pushing the slits 34 of each piece 31 of the optical cable terminal processing diameter expanding device 30, the PVC tape winding of each outer peripheral slot so that the inclination of the diameter expanding hole 33 becomes divergent toward the tip end of the multi-slot optical cable. The part is inserted into the diameter expansion hole 33 to expand the diameter. The short side 32 of each piece 31 is gathered on the outer peripheral surface of the central slot, and the short side 3
A central slot is fixed to a central hole 35 formed by assembling the two.

The optical cable terminal processing expanding tool 30
After the PVC tape is wound on the peripheral surface of the optical cable, the optical cable terminal processing expanding tool 30 is fixed and integrated, and the holding tapes of the central slot and the outer peripheral slot ahead of the optical cable terminal processing expanding tool 30 are peeled off. Then, the slot rod is cut to expose the optical fiber and the tension member.

Such an optical cable terminal processing diameter expanding device 3
0, the central slot of the multi-slot optical cable is fixed at the central hole 35 at the central portion, and the outer peripheral slot around the central slot is expanded at the enlarged diameter hole 33. Connection work and the like are easy. Further, even after the connection portion of the multi-slot optical cable is housed in the optical closure, the optical cable terminal processing expanding tool 30 is attached, so that the optical fiber can be used for reconnection, branching, trouble transfer, etc. of the multi-slot optical cable. Identification work, connection work, etc. can be easily performed.

The optical cable terminal processing expansion tool 1 and the optical cable terminal processing expansion tool 30 are not limited to a super multi-core multi-slot optical cable having 3000 or more cores.
It can be used for a multi-slot optical cable of about 1000 cores, and an optical cable other than these multi-slot optical cables, for example, an optical cable having a slot in the center and an airbron (pneumatic pressure feeding) pipe disposed around the center, Can be used for an optical cable having a tension member around which an outer peripheral slot is arranged.

[0027]

As described above, in the optical cable terminal processing expanding tool according to the present invention, the end of an optical cable such as a multi-slot optical cable can be expanded and the expanded state can be maintained. In connection between terminals of the slot optical cable and terminal processing such as termination of the terminal, it is possible to easily perform slot cutting work, tension member processing work, optical fiber identification work, optical fiber connection work, etc. Also, even after connecting or terminating an optical cable such as a multi-slot optical cable to an optical closure, a termination frame, or the like, it is possible to easily perform optical fiber identification work, branch work, connection work, and the like. This has an excellent effect of improving the workability of the terminal processing and the discrimination of the optical fiber.

[Brief description of the drawings]

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a view showing one embodiment of an optical cable terminal processing expander according to the present invention, wherein (a) is a top view, (b) is a side view, and (c) is a bottom view.

FIG. 2 is a schematic view showing an example of a procedure for using the optical cable terminal processing expander of the present invention.

FIG. 3 is a side view showing an example of a form in which a multi-slot optical cable is housed in an optical closure using the optical cable terminal processing expanding tool of the present invention.

FIG. 4 is a view showing an example of an embodiment of an optical cable terminal processing expander according to the present invention.

5A and 5B are views showing an example of a piece of the diameter expanding device for processing an optical cable terminal according to the present invention, wherein FIG. 5A is a top view, FIG. 5B is a side view, FIG. 5C is a bottom view, and FIG. FIG.

FIG. 6 is a sectional view showing an example of a multi-slot optical cable.

[Explanation of symbols]

1 ... Expansion tool for optical cable terminal treatment, 2 ... Disc, 2a ...
・ Peripheral surface, 3 ・ ・ ・ Expansion groove, 4 ・ ・ ・ Through hole, 5 ・ ・ ・ Cut, 3
0 ... Expansion tool for optical cable termination, 31 ... Piece, 3
2 ... short side part, 33 ... enlarged diameter hole, 34 ... splitting

Claims (2)

[Claims] 1. A circular plate having at least one semi-circular enlarged-diameter enlarged groove having at least one semicircular cross-sectional shape formed on a peripheral surface thereof, and a circular through hole formed at a center portion of the circular plate. A diameter expanding device for processing an optical cable terminal, wherein a cut is formed from a peripheral surface of a plate to a through hole. 2. A donut-shaped optical cable terminal treating and expanding device in which a plurality of pieces each having a fan shape in a plane shape are arranged such that the short sides thereof are located inside, wherein the pieces have radial directions. A diameter-enlarging tool for processing an optical cable terminal, wherein a circular diameter-enlarging hole is formed at an angle, and a cut is made from a short side or a long side of the piece to the diameter expanding hole.