JPH11295535A - Coated optical fiber housing case lamination unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To neatly house multi-fiber fibers (4-fiber fiber tape or the like) and small- fiber fibers (single-fiber fiber or the like) branched from there, to easily perform the connection work of the multi-fiber fibers and the connection work of the small-fiber fibers and to prevent the twitch of the fibers from being generated at the time of work. SOLUTION: Plural small-fiber fiber housing cases 3 are laminated on one multi-fiber fiber housing case 1. The multi-fiber fiber housing case 1 is provided with the slack housing part 19 of the multi-fiber fibers 49 and 51A, the housing part 23 of the connection part 55 of the multi-fiber fibers and the housing part 25 of a fiber branching part 51C. The small-fiber fiber housing case 3 is provided with the slack housing part 39 of the small-fiber fibers 51B and 42 and the housing part 43 of the connection part 57 of the small-fiber fibers. The multi-fiber fiber housing case 1 and the small-fiber fiber housing case 3 are provided with fitting parts 17 and 37 to a column and are made individually rotatable back and forth centering the column. Fiber introduction parts 27 and 45 are provided near the fitting parts 17 and 37 of the multi-fiber fiber housing case 1 and the small-fiber fiber housing case 3 and an opening part 47 for passing through the small-fiber fiber 51B disposed from the multi-fiber fiber housing case 1 to the small-fiber fiber housing case 3 is provided near the fitting part 37 of the small-fiber fiber housing case 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-core optical fiber (hereinafter referred to as "multi-core fiber") and a plurality of low-core optical fiber cores (hereinafter, referred to as "multi-core fiber") branched from the multi-core fiber. ) And an optical fiber core storage case stacking unit.

[0002]

2. Description of the Related Art For example, a 4-core optical fiber (hereinafter referred to as a 4-core optical fiber) drawn from an optical cable is branched into four single-core optical fibers (hereinafter referred to as a single-core optical fiber). At the place where wiring is performed, the connection is made between the four branched single-core wires and the other single-core wires, so that the core wires are likely to be complicated. For this reason, a storage case stacking unit has been proposed in which a storage case for storing a 4-core tape core wire and a storage case for storing a single-core core wire and a connection portion thereof are stacked in two stages to reduce the complexity of the core wires. Have been.

[0003]

However, since the conventional storage case stacking unit has a structure in which a two-stage storage case is slid out like a drawer of a desk, the storage case is pulled out to perform work. At times, the cord is likely to be pulled near the cord introduction portion of the storage case. Pulling of the core leads to increased loss and disconnection. In addition, since the four single cores are collectively stored in one storage case, the single cores are likely to be complicated.

[0004] Therefore, an object of the present invention is to neatly store multi-core fibers (four-core tape, eight-core tape, etc.) and small cores (single-core, two-core, etc.) branched therefrom. Can,
Therefore, an object of the present invention is to provide an optical fiber core storage case laminated unit in which operations such as maintenance and switching connection of the core can be easily performed later, and the core is hardly pulled during the operation.

[0005]

In order to achieve the above object, an optical fiber core storage case lamination unit according to the present invention is provided on a single multi-core storage case for storing multi-core fibers. A plurality of small-core storage cases for storing one or more branched small-core wires are laminated, and the multi-core storage case has an extra length for storing the extra length of the multi-core wires. A storage portion, and a branch portion storage portion for storing a branch portion from the multi-core wire to a plurality of low-core wires, wherein the low-core storage case stores a connection portion for storing the connection portion of the low-core wires. And a multi-core storage case and a small-core storage case, and a part of the periphery of the multi-core storage case and the small-core storage case is fitted to a column. It is possible to reciprocate individually around this support,
The multi-core storage case and the low-core storage case have a core introduction portion near the fitting portion with the support, and the low-core storage case has a multi-core storage case near the fitting portion with the support. It is characterized by having an opening for passing a small number of core wires from the core wire storage case to the small core wire storage case.

In the case where the connection of the multi-core fiber is performed in the multi-core storage case, the multi-core storage case is provided with a connection storage section for storing the connection section of the multi-core cable. The branch storage section of the multicore storage case is preferably provided as a predetermined section, but the branch section is stored in an appropriate location in the multicore storage case without being provided as the predetermined section. It may be. In short, any form may be used as long as the branch portion from the multi-core cable to the small-core cable is stored in the multi-core storage case.

In the optical fiber core storage case laminated unit of the present invention, the fitting portion of the multi-core fiber storage case and the small-core fiber storage case with the column is formed at a position away from the extra length storage portion. Preferably, the opening of the small-core storage case is formed between the fitting portion and the extra-length storage portion.

[0008] Further, the optical fiber core storage case laminated unit of the present invention is a multi-core fiber storage case, comprising: a multi-core fiber storage case having a branch part from a multi-core fiber to a few cores in the middle thereof.
It is preferable that the multi-core fiber and the branch part are stored in advance, and the low-core fiber of the branch core unit is stored in the low-core fiber storage case in advance.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 6 show one embodiment of the present invention. In the figure, reference numeral 1 denotes a multi-core storage case,
Is a plurality of small-core storage cases stacked on the multi-core storage case 1, 5 is a case support, and 7 is a column integrally provided on the case support 5. FIG. 1 shows a state where the multi-core storage case 1 is located at the stacking position and the low-core storage case 3 is pulled out to the near side for work.
Shows a state where the small-core storage case 3 is located at the stacking position and the multi-core storage case 1 is pulled out to the near side for work.

As shown in FIG. 4 (b), the multi-core storage case 1 has a bottom plate 9, a first outer wall 11A, a second outer wall 11B, an inner wall 13, a core wire protrusion preventing piece 15, a support post. The fitting portion 17 and the like are integrally formed of plastic. Between the first and second outer peripheral walls 11A and 11B and the inner peripheral wall 13 is a multi-core extra length storage portion 19. The extra-length storage portion 19 has an elliptical shape having two parallel sides. The second outer peripheral wall 11B has parallel straight portions corresponding to the two parallel sides, and partition walls 21 are provided in parallel inside the parallel straight portions. Between the partition wall 21 and the second outer peripheral wall 11B, there is provided a connecting portion housing portion 23 of a multi-core cable. Further, a first outer peripheral wall 11A extends in parallel outside one straight portion of the second outer peripheral wall 11B, and a space between the first outer peripheral wall 11A and the second outer peripheral wall 11B is formed from a multi-core wire. A branch storage section 25 stores a branch to a single core.

The fitting portion 17 to the column is provided with the extra-length storage portion 1.
9 is formed on the opposite side to the branch storage section 25 and away from the extra-length storage section 19. The first outer peripheral wall 11A is
7, the notch serves as a leading portion 27 of the multi-core cable.

Next, the small-core storage case 3 is shown in FIG.
As shown in FIG. 7, the bottom plate 29, the outer peripheral wall 31, two elliptical inner peripheral walls 33A and 33B, the core wire protrusion preventing piece 35, the fitting portion 37 to the support, and the like are integrally formed of plastic. Between the outer peripheral wall 31 and the inner peripheral walls 33A and 33B is a single-core extra length storage section 39. Extra storage section 39
Is an oval shape having two parallel sides. The outer peripheral wall 31 has parallel straight portions corresponding to the two parallel sides, and partition walls 41 are provided in parallel inside the parallel straight portions. Between the partition wall 41 and the outer peripheral wall 31 is a single-core connecting portion storage portion 43.

The fitting portion 37 to the column is formed at a position distant from the extra-length storage portion 39 as in the case of the multi-core storage case 1. The outer peripheral wall 31 is cut out in the vicinity of the fitting portion 37, and this notch is formed as a small-core introduction portion 45.
It has become. Further, an opening 47 is formed between the fitting portion 37 and the extra-length storage portion 39 so that the bottom is removed.

The multi-core storage case 1 and the small-core storage case 3 configured as described above are stacked as shown in FIG. That is, the multi-core storage case 1 is the lowermost layer, and the number of small-core storage cases 3 corresponding to the number of single cores branched from the multi-core is laminated thereon. The fitting portions 17 and 37 of the storage cases 1 and 3 are fitted to the columns 7 of the case support 5, so that the storage cases 1 and 3 can individually reciprocate around the columns 7. ing.

FIG. 5 shows a state in which the core wires are stored in the multi-core storage case 1 and the small-core storage case 3. Reference numeral 49 denotes a four-core tape core introduced from the outside into the multi-core storage case 1, and 51A denotes a four-core tape core of the branch core unit.
Reference numeral 1B denotes four single cores branched from the four-core tape core 51A, 51C denotes a core branch portion of the branch core unit, and 53 denotes a single core introduced from the outside into the small core storage case 3.
Reference numeral 5 denotes a connection portion between the four-core tape wires 49 and 51A, and reference numeral 57 denotes a connection portion between the single-core wires 51B and 53.

In the multi-core storage case 1, the four-core tape core 49 introduced from the outside is connected to the four-core tape core 51A of the branch core unit.
5 is stored in the connection portion storage portion 23, and the extra connection length portion is stored in the extra length storage portion 19. The core branch part 51C of the branch core unit is stored in the branch storage part 25. Core branch 5
The single core wire 51B extending from 1C goes around the outside of the second outer peripheral wall 11B and enters the small core wire storage case 3 through the opening 47 of the small core wire storage case 3.

In the small-core storage case 3, the single core 51B of the branch core unit rising from the multi-core storage case 1 is connected to the single core 53 introduced from the outside, and the core is connected. The wire connection portion 57 is stored in the connection portion storage portion 43, and the extra connection length portion is stored in the extra length storage portion 39. Two oval inner peripheral walls 33A and 33B are provided in the small-core storage case 3.
Are provided because the single core wires 51B and 5
3 enters the extra length storage section 39 from the same direction, so that one of the single core wires (in the illustrated example) 51B is guided in an S-shape to reverse the winding direction.

As shown in FIG. 3A, a plurality of the small-core storage cases 3 are stacked on the multi-core storage case 1 as shown in FIG. , Storage operation is performed.

FIG. 3 (b) shows a multi-core storage case 1 with four cores.
The state in which the core tape cores 49 and 51A, the connection part 55 thereof, and the core branch part 51C are stored, and the single core cores 51B and 53 and the connection part 57 are stored in the small core storage case 3, It is schematically shown. The four single core wires 51B extending from the core branch portion 51C pass through the opening 47 of the small core storage case 3 and are stored in each small core storage case 3 one by one.

The multi-core storage case 1 and the plurality of small-core storage cases 3 are stacked at the same position when the work is not performed. For example, work is performed in any of the small-core storage cases 3. At this time, as shown in FIG. 1, only the small-core storage case 3 is rotated around the column 7 and pulled out from the lamination position (the position where the multi-core storage case 1 is located) to the near side for work. Similarly, when work is performed in the multi-core storage case 1, as shown in FIG. 2, only the multi-core storage case 1 is pulled out to the front side to perform the work.

As described above, even when the multi-core storage case 1 or the small-core storage case 3 is pulled out from the lamination position, the four-core tape core 49 and the single-core core 53 introduced from the outside are formed on the support 7. The single core 51B passing from the multi-core storage case 1 to the small-core storage case 3 passes through the opening 47 near the support 7 because it passes through the nearby core introduction ports 27 and 45. Therefore, there is no possibility that any of the cords may be pulled.

When the storage case laminated unit of this embodiment is newly installed, the multicore fiber 51A of the branch core unit and the branch portion 51C are previously stored in the multicore storage case 1.
Is preferably installed in a state where the small core wire 51B of the branch core unit is stored in the small core wire storage case 3 in advance. In this way, at the site, the multicore storage case 1 may be pulled out to connect and store the four-core tape core, and the small-core storage case 3 may be drawn out to connect and store the single core core. So the work is greatly simplified.

FIG. 6 shows means for locking the small-core storage case 3 at the stacking position. A locking recess 59 is formed in the small-core storage case 3 at a position away from the fitting portion 37.
Correspondingly, a locking projection 61 is formed on the case support 5 (the relationship between the projections and depressions may be reversed). When the small-core storage case 3 is in the stacking position, the locking concave portion 59 and the locking projection 61 are engaged by the spring elasticity of the locking concave portion 59 as shown in FIG. Held in that position. When pulling out the small core storage case 3, the locking recess 1
If the claw 63 on the side opposite to 5 is pulled to the near side, the locking concave portion 59 comes off the locking convex portion 61 as shown in FIG.

In the above-described embodiment, the case where the 4-core tape is used as the multi-core and the single-core is used as the low-core is described. It may be a number. Further, in the above-described embodiment, the connection portion storage portion for storing the connection portion of the multi-core wire is provided in the multi-core storage case. However, when the connection of the multi-core wire is not performed (the end portion of the multi-core wire is In the case of branching into a single-core cable and connecting the single-core cable to the end thereof), the connection portion storage section can be omitted.

[0025]

As described above, according to the present invention, when a multi-core cable and a small-core cable are connected via a branch core unit having a branch portion from the multi-core cable to the small-core cable, The extra length of the multi-core cable and the branch from the multi-core cable to the small-core cable are stored in the multi-core cable storage case, and the connection part and the extra length of the multi-core cable are stored separately in multiple small-core cable storage cases. As a result, the multi-core cable and the small-core cable can be stored neatly, and the connection work of the low-core cable and the maintenance of the core cable performed later can be easily performed without causing tangling of the core cable. be able to. In addition, the core wire introduction port of each core storage case is located near the fitting part with the support, and there is also an opening for passing the small core wire from the multi core storage case to the small core storage case. Since it is located in the vicinity of the fitting portion with the support, when any of the core wire storage cases is pulled out to the near side and work is performed, it is difficult for the core wire to be pulled and damage to the core wire can be prevented.

Further, if the opening of the small-core storage case is formed between the fitting portion to the column and the extra-length storage portion, the small-core cable extending from the multi-core storage case to the small-core storage case is separated. Interference with the cord is reduced, so that the cord is less likely to be entangled or pulled.

Also, if the multi-core storage case stores the multi-core wires and the branch portion of the branch core unit in advance, and the low-core storage case stores the small cores of the branch core unit in advance, At the work site, the operation of connecting the multi-core cable is performed by pulling out the multi-core storage case and the operation of connecting the low-core cable by pulling out the low-core storage case is greatly simplified.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of an optical fiber core storage case lamination unit according to the present invention in a state where a small core storage case is drawn out.

FIG. 2 is a plan view showing a state where the multi-core storage case is pulled out.

FIGS. 3A and 3B are front views of the storage case in a stacked state according to an embodiment of the present invention, and FIG. 3B is an explanatory view schematically showing a state in which a core is stored;

4A is a perspective view of a small-fiber-core storage case, and FIG. 4B is a perspective view of a multi-fiber-core storage case in one embodiment of the present invention.

FIG. 5 is a perspective view showing a state in which a core is stored in a multi-core storage case and a small-core storage case in one embodiment of the present invention.

FIG. 6A is a plan view showing a state in which the small-core storage case is held at a stacking position in one embodiment of the present invention;
(B) is a plan view showing a state where the small-core storage case is slightly pulled out from the stacking position.

[Explanation of symbols]

 1: Multi-core storage case 3: Low-core storage case 5: Case support 7: Post 9: Bottom plate 11A, 11B: Outer peripheral wall 13: Inner peripheral wall 17: Fitting portion 19: Extra length storage portion 23: Connection portion Storage part 25: Branch storage part 27: Core wire introduction part 29: Bottom plate 31: Outer peripheral wall 33A, 33B: Inner peripheral wall 37: Fitting part 39: Extra length storage part 43: Connection part storage part 45: Core wire introduction part 47: Opening 49: Four-core tape core introduced from outside 51A: Four-core core of branch core unit 51B: Single core of branch core unit 51C: Core branch of branch core unit 53 : Single core fiber introduced from outside 55: Connection part of 4-core tape core fiber 57: Connection part of single core fiber

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Sadaaki Takano 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation

Claims (3)

[Claims] 1. A plurality of small-fiber optical fiber cores branched from said multi-core fiber on a single multi-core fiber storage case for housing a multi-core optical fiber (hereinafter, referred to as a multi-core fiber). A plurality of small-core storage cases for storing one or more small-core cores (hereinafter, referred to as small cores) are laminated, and the multi-core storage case has an extra length for storing the extra length of the multi-core cores. A storage portion, and a branch portion storage portion for storing a branch portion from the multi-core fiber to a plurality of low-core wires, wherein the low-core storage case stores a connection for storing a connection portion of the low-core wires. A multi-core storage case and a small-core storage case, and a part of the periphery of the multi-core storage case and the small-core storage case is fitted to a column. The multi-core storage case and a small number of The core storage case has a core introduction portion near the fitting portion with the support, and the small core storage case has a small core from the multi-core storage case near the fitting portion with the support. An optical fiber core storage case lamination unit, comprising: an opening for passing a small number of core wires extending to the storage case. 2. A fitting portion of the multi-core storage case and the small-core storage case with a support is formed at a position away from the extra-length storage portion, and an opening of the small-core storage case is formed by the fitting. 2. The optical fiber core storage case lamination unit according to claim 1, wherein the optical fiber core storage case lamination unit is formed between the joint part and the extra length storage part. 3. A multi-core storage unit, comprising: a multi-core storage case having a branch portion from the multi-core to the low-core in the middle thereof.
2. The optical fiber core storage case stack according to claim 1, wherein the multi-core fiber and the branch portion are stored in advance, and the low-core fiber storage case is pre-stored with the few core wires of the branch core unit. unit.