JP3571532B2 - Diameter, optical closure and termination for optical cable termination - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an optical cable terminal treatment expanding tool used for terminal treatment of an optical cable such as a multi-slot optical cable , and an optical closure in which an optical cable that has been subjected to terminal treatment is installed, and a terminator . An optical cable terminal processing expander that can increase the diameter of each slot unit of the optical cable and improve the workability of terminal processing and the discrimination of the optical fiber core, and the light in which the optical cable that has been processed with this terminal is installed. Closures and terminations .
[0002]
[Prior art]
With the increase in the number of optical fiber cables (hereinafter, referred to as optical cables), for example, as shown in FIG. 6, a large number of optical fiber tapes or optical fiber tapes (hereinafter, referred to as optical fibers) are accommodated. Multi-slot optical cables having a plurality of slotted units (hereinafter referred to as slots) are being adopted.
[0003]
The multi-slot optical cable 40 includes a center slot 41, seven outer peripheral slots 42 gathered on the outer peripheral surface of the center slot 41, a holding tape 43 wound on the slot assembly, and a holding tape 43. It is composed of a filling material filled between the slots 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, 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, and a holding tape 55 wound around the slot rod 52.
[0004]
In connection between terminals of such a multi-slot optical cable 40 and terminal processing such as termination of the terminal, a cutting operation of the center slot 41 and the outer peripheral slot 42, a processing operation of the tension members 48 and 53, and a processing operation of the optical fibers 49 and 54. When the identification work and the connection work of the optical fibers 49 and 54 are performed, a large number of the optical fibers 54 pulled out from the outer peripheral slot 42 become obstacles, which hinders the terminal processing work of the center slot 42. In particular, in the terminal processing of an ultra-multi-core multi-slot optical cable containing 3000 or more optical fibers, the terminal processing operation of the central slot becomes considerably difficult. In addition, when reconnecting, branching, or relocating an optical cable after installing the connection part or termination of the ultra-multi-core multi-slot optical cable on an optical closure or termination, the identification of the optical fiber in the center slot is not possible. Almost impossible.
[0005]
[Problems to be solved by the invention]
Therefore, object of the present invention, a larger diameter of the optical cable terminal such as multi-slot optical cable, optical cable terminal processing diameter expanding tool can improve the workability and the optical fiber identification of terminal treatment of optical cables, and which The present invention is to provide an optical closure and a termination rack in which a connection portion and a termination portion of an optical cable subjected to terminal processing are installed .
[0006]
[Means for Solving the Problems]
Such a subject is a disk , a through hole provided at a center portion thereof along a central axis of the disk, and a through hole provided on a peripheral surface of the disk and inclined with respect to a central axis of the disk. In addition, the present invention is solved by an optical cable terminal processing expanding tool comprising one or more expanding grooves having a divergent shape and a cut from the peripheral surface of the disk to a through hole .
In addition, a planar shape is a fan-shaped piece, a donut-shaped optical cable terminal processing diameter-enhancing device that is obtained by collecting a plurality of pieces so that the short side of the piece is located inside, the piece has a fan-shaped radial direction The problem is solved by an optical cable terminal processing expanding tool in which an inclined circular expanding hole is formed, and a cut is formed from a short side or a long side of the piece to the expanding hole.
In addition, an optical closure containing the connection portion of the optical cable that has been subjected to the terminal treatment with the optical cable terminal processing diameter-enlargement tool, and a termination in which the terminal end portion of the optical cable that has been subjected to the terminal treatment with the optical cable terminal processing diameter-enlargement tool are installed. Settled by the ends.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the diameter expander for optical cable terminal treatment of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the embodiments described below.
[0008]
(Form example 1)
FIG. 1 is a view showing an example of an embodiment of the optical cable terminal processing expander of the present invention.
The diameter increasing device 1 for processing an optical cable terminal has, on a peripheral surface 2a of a disk 2 having a truncated conical shape, an enlarged diameter 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 disk 2, and a cut 5 following the through hole 4 is formed from the peripheral surface 2 a of the disk 2.
[0009]
The material of the disk 2 may be any material that can expand the slit 5 by elastic deformation, such as a rubber-like material such as ethylene-propylene-diene copolymer (EPDM), silicone, or urethane; Materials. Above all, EPDM is preferable in consideration of characteristics such as elasticity.
The thickness and diameter of the disc 2 are set according to the outer diameter, the number of cores, and the like of the optical cable to be expanded, and are not particularly limited. For example, in the case of a multi-slot optical cable having 3000 cores, The diameter 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.
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.
[0010]
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 enlarged diameter groove 3 is formed at a position equally spaced around the circumference of the disk 2.
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. The radius is between 6.5 and 8.5 mm.
[0011]
Further, it is necessary to provide the enlarged diameter groove 3 so as to be inclined in a divergent shape. The inclination angle is, for example, in a range of 15 to 45 degrees 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. This has an adverse effect on transmission characteristics.
[0012]
The diameter of the through hole 4 is determined by the diameter of the central slot of the multi-slot optical cable whose diameter is enlarged, and is not particularly limited. For example, in the case of a 3000-core multi-slot optical cable, 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.
[0013]
Next, a method of using the optical cable terminal treatment expanding tool 1 will be described.
FIG. 2 is a schematic view showing a procedure of a method of expanding the diameter of a 3000-core multi-slot 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, the central slot 12 and the outer peripheral slot 13 are exposed, and the center slot 12 and the outer peripheral slot 13 about 25 mm away from the cable jacket end are As shown in FIG. 2A, a 10 mm-wide polyvinyl chloride tape (hereinafter, referred to as a PVC tape) is wound, and a tape winding portion 14 is provided.
[0014]
Next, an optical cable terminal treatment 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. 2 (b), the center of the expanding groove 3 is widened toward the tip 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.
[0015]
Then, as shown in FIG. 2 (c), a PVC tape 15 is wound on the peripheral surface and the outer peripheral slot 13 of the optical cable terminal processing expander 1, and the optical cable terminal expander 1 and the outer peripheral slot 13 are fixed. After that, the presser-wound tape 16 of the central slot 12 and the outer peripheral slot 13 is peeled off from the optical cable terminal processing diameter expanding tool 1, and the slot rod (not shown) is cut to expose the optical fiber 17 and the tension member 18. .
[0016]
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. 3, the multi-slot optical cable 10 whose diameter has been expanded by the optical cable terminal treatment expanding tool 1 and the optical fiber 17 is exposed is inserted into the end face plate 22 of the optical closure 20, and the tension member 18 is moved. It is fixed by 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 stored in the core wire storage article 24. After the connection of the optical fiber 17, the closure sleeve 21 is attached, and the housing of the connection portion of the multi-slot optical cable 10 in the optical closure 20 is completed.
[0017]
In such a diameter expanding device 1 for processing an optical cable terminal, 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 diameter expanding groove 3. Since it is expanded, the work of identifying and connecting the optical fiber 17 in the central slot 12 is easy. Further, even after the connection portion of the multi-slot optical cable 10 is housed in the optical closure 20, since the optical cable terminal processing expander 1 is attached, the multi-slot optical cable 10 can be used for reconnection, branching, trouble transfer, and the like. In addition, the work of identifying and connecting the optical fiber 17 can be easily performed.
[0018]
(Form example 2)
FIG. 4 and FIG. 5 are views showing an example of an embodiment of the optical cable terminal processing expander of 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-shaped planar shape such that a short side portion 32 thereof is on the inside. A circular enlarged hole 33 inclined in the radial direction is formed, and a cut 34 extending from the short side 32 of the piece 31 to the enlarged diameter hole 33 is formed.
[0019]
The size of the optical cable terminal processing expander 30 is set according to the outer diameter of the optical cable to be expanded, the number of cores, and the like, and is not particularly limited. For example, in the case of a multi-slot optical cable having 3000 cores, The thickness is 10 to 30 mm, the diameter of the donut-shaped expander is 60 to 100 mm, and the center hole 35 of the donut-shaped expander formed by gathering the short sides 32. Has a diameter of 16 to 22 mm.
[0020]
The number of the pieces 31 is set by the number of the 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 a material capable of expanding 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.
[0021]
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. For example, in the case of a 3000-core multi-slot optical cable, the diameter is 6 0.5 to 8.5 mm.
Further, it is necessary to provide the enlarged diameter hole 33 so as to be inclined in the fan-shaped radial direction. The inclination angle is, for example, in the range of 15 to 45 degrees with respect to the central axis of the optical cable terminal processing diameter expanding tool 30. If the inclination angle is less than 15 °, the diameter of the multi-slot optical cable terminal cannot be sufficiently increased, and if it exceeds 45 °, the bending angle of the expanded outer peripheral slot becomes too large. This has an adverse effect on transmission characteristics.
The width of the slit 34 is not particularly limited, but is, for example, 0 to 2 mm. The slit may be formed to extend from the long side of the piece 31 to the enlarged diameter hole 33.
[0022]
Next, a method of using the optical cable terminal processing expanding tool 30 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 to expose the center slot and the outer peripheral slot, and the center slot and the outer periphery are about 25 mm away from the cable jacket end. Wrap a 10 mm wide PVC tape around the slot.
[0023]
Next, an optical cable terminal processing expanding tool 30 is prepared. A PVC tape is wound around each outer peripheral slot so that the slit 34 of each piece 31 of the optical cable terminal processing expanding tool 30 is pushed and expanded so that the inclination of the expanding hole 33 becomes divergent toward the tip of the multi-slot optical cable. The part is inserted into the diameter expansion hole 33 to expand the diameter. The short sides 32 of each piece 31 are gathered on the outer peripheral surface of the central slot, and the center slot is fixed to a center hole 35 formed by gathering the short sides 32.
[0024]
Then, a PVC tape is wrapped around the peripheral surface of the optical cable terminal processing expanding tool 30, and the optical cable terminal processing expanding tool 30 is fixed and integrated. Then, the holding tape of the outer peripheral slot is peeled off, and the slot rod is cut to expose the optical fiber and the tension member.
[0025]
In such an optical cable terminal processing expanding tool 30, since the central slot of the multi-slot optical cable is fixed at the central hole 35 at the center and the outer peripheral slot around the central slot is expanded at the expanding hole 33. The work of identifying and connecting the optical fiber in the central slot is easy. Further, even after the connection portion of the multi-slot optical cable is housed in the optical closure, since the optical cable terminal processing expanding tool 30 is attached, 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.
[0026]
The optical cable terminal processing expander 1 and the optical cable terminal processing expander 30 can be used for a multi-slot optical cable of about 1000 cores, in addition to a super-multi-core multi-slot optical cable of 3000 cores or more, Optical cables other than these multi-slot optical cables, for example, an optical cable having a slot in the center and an air blown (pneumatic feeding) pipe arranged around it, and an optical cable having a tension member in the center and an outer peripheral slot arranged around it Can also be used.
[0027]
【The invention's effect】
As described above, in the optical cable terminal processing expander of the present invention, the terminals of an optical cable such as a multi-slot optical cable can be expanded and the expanded state can be maintained. In connection with the terminal and termination of the terminal, etc., slot cutting work, tension member processing work, optical fiber identification work, optical fiber connection work, etc. can be easily performed. Even after the connection and termination of the optical cable, such as the optical cable, is installed on an optical closure, termination, etc., the work of optical fiber identification, branching, connection, etc. can be easily performed, and the work of terminal processing of the optical cable This provides an excellent effect that the performance and the optical fiber identification property can be improved.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a view showing an 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 diagram 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 how a multi-slot optical cable is housed in an optical closure using the optical cable terminal processing expander of the present invention.
FIG. 4 is a diagram showing an example of an embodiment of the optical cable terminal processing expander of the present invention.
5A and 5B are views showing an example of a piece of the optical cable terminal processing expander of 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]
DESCRIPTION OF SYMBOLS 1 ... Expansion tool for optical cable terminal processing, 2 ... Disc, 2a ... Peripheral surface, 3 ... Expansion groove, 4 ... Thru-hole, 5 ... Cut, 30 ...・ Expansion device for optical cable terminal treatment, 31 ・ ・ ・ piece, 32 ・ ・ ・ short side, 33 ・ ・ ・ expansion hole, 34 ・ ・ ・ cut

Claims (6)

A disk , a through hole provided in the center thereof along the center axis of the disk, and provided on the peripheral surface of the disk, inclined with respect to the center axis of the disk, and A diameter expanding tool for processing an optical cable terminal , comprising: at least one expanding groove having a divergent shape; and a cut from the peripheral surface of the disk to a through hole . 2. The optical cable terminal processing device according to claim 1 , wherein the circular plate has a shape of a truncated cone, a column, or a polygonal plate . 3. 3. The diameter expanding tool for processing an optical cable terminal according to claim 1, wherein a cross-sectional shape of the diameter expanding groove is substantially semicircular. A donut-shaped optical cable terminal processing diameter-enlargement tool in which a plurality of pieces each having a fan shape in a plane shape are gathered so that the short sides thereof are located inside,
In the above-mentioned piece, a fan-shaped circular enlarged hole inclined in the radial direction is formed, and a cut is formed from the short side or long side of the piece to the enlarged diameter hole. Tool. An optical closure accommodating a connection portion of an optical cable that has been terminal-processed with the optical cable terminal processing diameter expanding tool according to any one of claims 1 to 4. A terminating frame on which a terminating portion of an optical cable that has been subjected to terminal treatment with the optical cable terminal treating tool according to any one of claims 1 to 4 is installed.

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