JP3810481B2 - Extra length processing structure of optical fiber and optical fiber wiring unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an extra length processing structure of an optical fiber for accommodating the extra length of the optical fiber , and an optical fiber wiring unit provided with the extra length processing structure of the optical fiber.
[0002]
[Prior art]
For example, in an optical fiber storage case such as an optical wiring rack, it is necessary to secure a surplus working length in the optical fiber housed inside, and this surplus portion is bent with a curvature exceeding a specified value to prevent bending loss. Processing to maintain the state is performed.
[0003]
Hereinafter, a conventional extra length processing structure will be described in detail.
FIG. 2 shows a surplus length processing structure using the wire trimming ring 1. This extra length processing structure is composed of a rectangular frame-shaped straightening ring 1 arranged as a pair on the upper and lower sides, and an extra length 3 of an optical fiber cord 2 formed by coding an optical fiber core wire with a reinforcing tube is used as an upper straightening ring 1. Hook it down into the inside of the lower straightening ring 1. The straightening rings 1 are arranged almost horizontally, respectively, so that the outside of the lower end portion of the extra length 3 of the optical fiber cord 2 is surrounded by the two straightening rings 1 so as not to protrude outward.
[0004]
[Problems to be solved by the invention]
In the surplus length processing structure of FIG. 2, when the surplus length 3 of a large number of optical fiber cords 2 is processed, for example, when only one arbitrary optical fiber cord 2 is taken out, the optical fiber cords 2 are easily entangled. There was a problem that it took time and effort.
In view of the above problem, it is conceivable to prepare a large number of extra-length storage cases and distribute and store the extra lengths. However, the extra-length storage cases are bulky, which requires installation space and increases costs. Will not lead to a fundamental solution.
[0005]
In view of the above circumstances, the present invention provides an inexpensive optical fiber extra length processing structure capable of performing extra length storage processing very easily , and an optical fiber wiring unit provided with the optical fiber extra length processing structure. The purpose is to do.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided an optical fiber surplus length processing structure for performing a process of maintaining a curved state on the surplus length portion of the optical fiber, wherein the optical fiber dropped inward from above is desired in a horizontal direction. Is formed in an elongated rectangular frame shape that is held in a U-shaped curve in the region, and an inner portion that is one of a pair of long sides of the rectangle is more than an outer portion that is the other of the long sides. An entrance member provided to be inclined so as to be higher , and a sheet-like partition member attached to the outer side of the entrance member and extending substantially vertically or inclined downward is provided in multiple upper and lower stages. The plurality of entrance members are horizontally displaced and arranged so that the inner portion of the lower entrance member substantially wraps in the plan view on the outer portion of the upper entrance member. Take on the outside A plurality of extra-length storage spaces for optical fibers corresponding to the respective entrance members are defined by the separated partition members, and are curved in a U shape at the short side portions at both ends in the longitudinal direction of the respective entrance members. the extra length handling structure of an optical fiber characterized that you have become the optical fiber is hooked to dropped in was solutions of the problems.
According to a second aspect of the present invention, there is provided an extra length processing structure for an optical fiber according to the first aspect, wherein the entrance member is attached to a fixing member of an optical fiber storage case for storing the optical fiber. It was made a solution.
According to a third aspect of the present invention, there is provided an extra length processing structure for an optical fiber according to the second aspect, wherein one end of the optical fiber is switchably connected to a connector stored in the optical fiber storage case. Means for solving the above-described problems were provided.
[0007]
According to a fourth aspect of the present invention, in any one of the first to third aspects, the plurality of inlet members are arranged so as to be inclined such that one side portion in the arrangement direction is higher than the opposite side portion. An extra length processing structure of an optical fiber characterized in that the above-described problem is solved.
According to a fifth aspect of the present invention, an optical fiber extra length processing structure according to any one of the first to fourth aspects is provided on a fixing member of an optical fiber storage case for storing an optical fiber. A fiber wiring unit is used as a means for solving the problems.
A sixth aspect of the present invention is the optical fiber wiring unit according to the fifth aspect , wherein one end of the optical fiber is switchably connected to a connector housed in the optical fiber housing case. It was a solution.
[0008]
Hereinafter , the operation of the present invention will be described.
According to the first aspect of the present invention, the surplus length collected in the middle of the optical fiber is dropped into the inside of the entrance member, and the surplus length is processed by bending the lower end into a U-shape with a curvature radius greater than a specified value. Below the entrance member, the surplus length is held within the area set by the entrance member, and the partition member prevents the extra length from protruding outside the area. Contact with the optical fiber or tangling of another optical fiber is prevented.
[0009]
Further , according to the present invention, the extra lengths of the optical fibers are distributed and stored in the extra length storage space, so that the extra lengths of a large number of optical fibers can be efficiently arranged and processed. Moreover, since the dimension of the entrance member and the separation distance between the partition members can be reduced within a range in which the optical fiber can be inserted, the extra lengths of a large number of optical fibers can be efficiently processed in a small space.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a perspective view showing an extra length processing structure of an optical fiber according to an embodiment of the present invention, which is an example applied to an optical fiber wiring unit.
In the figure , reference numeral 10 denotes a ring body, 11 denotes a partition sheet, and 12 denotes a support plate. The support plate 12 is a fixed member fixed at a fixed position, and corresponds to, for example, a side plate of an optical wiring rack. In the figure, three ring bodies 10 are attached to the support plate 12 in multiple stages while being shifted in the vertical direction (up and down in FIG. 1). The ring body 10 corresponds to the entrance member described in claim 1. Each ring body 10 has an elongated rectangular frame shape, and is attached so as to be parallel to the support plate 12. The mounting positions of these ring bodies 10 are also shifted in the horizontal direction so that the distance from the support plate 12 increases as the lower ring body 10 increases. Each ring body 10 is attached so as to be inclined so that a side portion (hereinafter referred to as “inner portion”) 13 on the support plate 12 side is higher than a side portion (hereinafter referred to as “outer portion”) 14 on the opposite side. It has been. The lower ring body 10 is attached to a position where the inner portion 13 substantially wraps with the outer portion 14 of the upper ring body 10 in plan view.
[0011]
A partition sheet 11 is suspended from the outer portion 14 of each ring body 10. The partition sheet 11 is made of plastic, polycarbonate or the like and has flexibility, and the upper end portion 15 thereof is fixed to the entrance member outer portion 14 by means such as adhesion. A curved portion 16 is formed in the vicinity of the upper end portion 15 of the partition sheet 11, and a downward portion from the curved portion 16 of the partition sheet 11 is a vertical portion 17 extending in the vertical direction. The curved portion 16 and the vertical portion 17 are provided by molding the partition sheet 11 itself. If the partition sheet 11 is highly flexible, for example, the upper end is aligned with the inclination of the outer portion 14 of the ring body 10. By attaching the part 15, it is possible to obtain a curved part by utilizing the fact that the upper end part 15 is curved by its own weight.
[0012]
Since the curved portion 16 of the partition sheet 11 attached to the upper ring body 10 corresponds to the attachment position of the lower ring body 10, the partition sheet 11 avoids interference with the lower ring body 10 just by the curved portion 16. It is supposed to be.
Between the partition sheet 11 and the support plate 12 or between the partition sheets 11, an extra length storage space 20 is provided for storing the extra length 19 of the optical fiber cord 18 in which the optical fiber core wire is covered with a reinforcing tube. Yes. The position where the extra length 19 is secured is preferably in the vicinity of the connection end between the optical fiber cords 18. For example, in an optical wiring rack or the like, there is a case where a connector storage box for storing a large number of connectors for connecting the optical fiber cords 18 is installed, and an extra length processing structure of the present application is provided in the vicinity of the connector storage box. In this case, the extra length 19 can be processed efficiently. In this case, if the optical fiber cords 18 are connected to each other by a connector, the extra length 19 is easily pulled out by the extra length processing structure when the connection is switched, and the connection switching operation can be performed quickly. . As the connector used here, for example, a multi-fiber optical fiber connector established in JIS C 5981 called an MT connector is applied.
The partition sheet corresponds to the partition member according to claim 1.
[0013]
Hereinafter, the operation and effect of the extra length processing structure of the optical fiber of this embodiment will be described. In order to process the extra length 19 of the optical fiber cord 18 by the extra length processing structure of the optical fiber, the extra length 19 collected in the middle of the optical fiber cord 18 is bent into a U shape and dropped into the ring body 10. Then, the optical fiber cords 18 on both sides of the extra length 19 are hooked on both ends of the ring body 10 in the longitudinal direction, and the extra length 19 is suspended from the ring body 10 into the extra length storage space 20. The lower end portion of the extra length 19 suspended in the extra length storage space 20 is bent and stored with a radius greater than a specified value. Further, since the surplus length 19 is bent by the bending portion 16 of the partition sheet 11 in the vicinity of the ring body 10, the bending radius of the optical fiber cord 18 can be relaxed, and the surplus length 19 can be reduced to the surplus length storage space. The extra length 19 of the optical fiber cord 18 can be efficiently accommodated while maintaining the radius of curvature simply by dropping it into 20.
The optical fiber cord 18 is hooked to both ends of the ring body 10 in the longitudinal direction when dropping the extra length 19 into the extra length storage space 20, so that a sufficient separation distance between the optical fiber cords 18 at both ends of the extra length 19 is ensured. Even when the surplus length 19 is relatively short, it is possible to secure the radius of curvature of the lower end portion of the surplus length 19. Further, in the surplus length processing structure of the present embodiment, even when the U-shaped portion of the surplus length 19 is simply dropped into the ring body 10 without hooking the optical fiber cord 18 on the ring body 10, Processing can be performed efficiently.
[0014]
In order to process the surplus length 19 of a large number of optical fiber cords 18, the surplus length 19 is dropped by distributing the optical fiber cords 18 to the respective ring bodies 10 in an approximately equal number. By doing so, the number of the optical fiber cords 18 accommodated in one surplus storage space 20 is reduced, and it is prevented that entanglement occurs when pulled out from the surplus storage space 20, and the ring body 10 is moved up and down. Since the optical fiber cord 18 is stored and pulled out in the target ring body 10 without interfering with the optical fiber cords 18 in the other ring bodies 10, the direction and the horizontal direction are shifted. The efficiency of the drawing work is improved. Moreover, since the ring bodies 10 are installed so as to be wrapped in a plan view, a large number of optical fiber cords 18 can be arranged in a small space and efficiently stored. As a result, when applied to a protective case for an optical connection portion such as an optical wiring rack, it is possible to obtain excellent effects such as an increase in optical fiber capacity.
[0015]
Further, the extra length processing structure of the optical fiber according to the present embodiment has a small number of parts, and can be configured simply by installing the ring body 10 to which the partition sheet 11 is attached at a desired position, so that assembly is easy. . In addition, the ring body 10 and the partition sheet 11 are both made of an inexpensive material, and each has a simple structure and can be easily manufactured. Therefore, the cost can be reduced.
[0016]
In addition, the installation number of the ring body 10 or the partition sheet | seat 11, a shape, and attachment direction are not limited to the description in the said embodiment. In addition, the entrance member is not limited to the ring body 10, and for example, a structure in which a pair of components are arranged apart from each other may be applied if the wiring region of the optical fiber cord 18 can be set in the horizontal direction. Is also possible. The partition sheet may be separated from the entrance member. In this case, an extra length storage space corresponding to the number of entrance members is formed by the partition sheet.
The present invention can be applied to the extra length processing of various optical fibers such as an optical fiber core wire that is not coded other than the optical fiber cord.
[0017]
【The invention's effect】
As described above, according to the surplus length processing structure for an optical fiber according to claim 1, the optical fiber dropped inward from above is bent in a U-shape in a desired region in the horizontal direction. An elongated rectangular frame-shaped entrance member to be held and a sheet-like partition member attached to the outer side of the entrance member and extending substantially vertically or inclined downward are collected in the middle of the optical fiber. The extra length is dropped inside the entrance member, the extra length is suspended from the entrance member, and the lower end of the extra length is bent into a U shape with a curve radius greater than the specified value so that the extra length is processed. Therefore, it can be constituted by only parts that have a simple structure and can be manufactured at low cost, and an excellent effect that the whole cost can be reduced is achieved.
[0018]
Further, according to the present invention, the plurality of the entrance members are arranged so as to be shifted in the horizontal direction, and the optical fiber corresponding to each entrance member is provided by the entrance member and the partition member attached to the outer side of each entrance member. A plurality of extra-length storage spaces are defined, and the extra lengths of the optical fibers are distributed in these extra-length containment spaces while being bent in a U-shape. Can be arranged and processed efficiently, and for example, the optical fiber accommodation amount of various optical fiber storage cases such as optical wiring racks can be increased.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a surplus length processing structure of an optical fiber according to an embodiment of the present invention.
FIG. 2 is a view showing a surplus length processing structure of an optical fiber of a conventional example, and is a perspective view showing a surplus length processing structure using a straightening ring.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Entrance member (ring body), 11 ... Partition member (partition sheet), 18 ... Optical fiber, 20 ... Extra length storage space.

Claims (6)

An extra length processing structure of an optical fiber for performing a process of maintaining a curved state in an extra length portion of the optical fiber,
An optical fiber (18) dropped inward from above is formed in an elongated rectangular frame shape that holds the optical fiber (18) curved in a U-shape in a desired region in the horizontal direction . And an inlet member (10) provided so as to be inclined so that the inner side which is one of the longer sides is higher than the outer side which is the other of the long sides , and attached to the outer side of the inlet member and substantially vertically downward Or it comprises a sheet-like partition member (11) extending in an inclined manner ,
A plurality of the inlet members (10) provided in the upper and lower stages are shifted in the horizontal direction, and the inner part of the lower inlet member is arranged so as to substantially wrap in the plan view on the outer part of the upper inlet member. By the entrance member (10) and the partition member (11) attached to the outer side of each entrance member (10), a plurality of extra length storage spaces (20) for optical fibers corresponding to the entrance members are defined. ,
Extra length handling structure of the short side portion of the longitudinal ends of the inlet member, an optical fiber characterized that you have become the optical fiber to be dropped in a curved state in a U-shape is hooked.   The extra length processing structure for an optical fiber according to claim 1, wherein the entrance member (10) is attached to a fixing member of an optical fiber storage case for storing the optical fiber (18).   The extra length processing structure of an optical fiber according to claim 2, wherein one end of the optical fiber (18) is switchably connected to a connector stored in the optical fiber storage case. Each of the said entrance member (10) is inclined and arrange | positioned so that the side part of the one side of an arrangement direction may become high with respect to the side part of an other side . The extra length processing structure of the optical fiber in any one . An optical fiber wiring unit comprising the optical fiber extra case processing structure according to any one of claims 1 to 4 provided on a fixing member of an optical fiber housing case for housing an optical fiber (18). The optical fiber wiring unit according to claim 5 , wherein one end of the optical fiber (18) is switchably connected to a connector stored in the optical fiber storage case.

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