JP5774454B2 - Optical cable connection closure - Google Patents

Description

  The present invention relates to an optical cable connection closure used when laying and distributing an optical communication cable including a plurality of optical cable cores in a building such as a building, particularly in an underground portion.

  Generally, when connecting a cable such as an optical cable, a cable core is connected using a connector or the like, and the connector or the like is protected by a closure. It is desired that such a closure can easily access the core wire connecting portion and has good workability.

  For example, a structure in which a plurality of splitter trays are stacked in the closure and an optical cable core wire is connected by sliding each splitter tray toward the work surface, as in the optical cable connection closure of Patent Document 1. It has become. In addition, each splitter tray is provided with a connecting portion so that each tray can store the connection work and the extra length of the core, so that the cores can be easily and easily distinguished.

JP 2007-147876 A

  However, in the invention of Patent Document 1, since the work cannot be done without pulling out the splitter tray, it is necessary to lengthen the extra length of the optical cable core for pulling out the tray. Careful attention to the disconnection of the core wire is required, which may increase the complexity of the work. It is also necessary to secure a space for pulling out the tray and working.

  Furthermore, since the connecting portion is housed inside the splitter tray, the tray must be pulled out every time when the connection state is confirmed, which is very inconvenient and requires a lot of work.

  The present invention has been made in view of the problems as described above, and the wiring form of the optical cable core is easy to organize, efficiently stores the connecting portion with the drop core and the extra length of the core, and performs construction and maintenance inspection. An object of the present invention is to provide a closure for connecting an optical cable that facilitates the work and can perform the work very easily even in an additional distribution work.

  The present invention solves the above-mentioned problems, and the invention of claim 1 is an optical cable connection closure for connecting an upstream optical cable core and a downstream optical cable core, the closure In the main body, there is a drop tray for connecting the upstream optical cable core and the downstream drop core drawn from the drop cable, and a downstream side drawn from the upstream optical cable and the branch cable. A splitter module having a branch cable tray for connecting a core cable for the branch cable, and a plurality of the splitter modules pivotally attached to a locking portion provided in the closure body. It is the closure for optical cable connection characterized by the above-mentioned.

  The invention according to claim 2 is the optical cable connection closure according to claim 1, wherein the drop tray is provided with a drop cable gripping member for gripping the drop cable.

  According to a third aspect of the present invention, the drop cable gripping member includes a gripping portion in which a groove for gripping the drop cable is formed on one surface and a lid portion that covers the gripping portion so as to be freely opened and closed. The part has a rib formed on a surface facing the gripping part, and the rib covers the gripping part with the lid part in a state where the drop cable is fitted in the groove of the gripping part. The optical cable connection closure according to claim 2, wherein the drop cable is pressed and the drop cable is fixed to the grip portion.

  According to a fourth aspect of the present invention, there is provided a passage core wire that passes through the closure body without branching in the closure body, and the cut upstream optical cable core wire is not connected to the downstream optical cable core wire. 4. A passage holding tray for storing a holding core wire in a held state is pivotally attached to a locking portion provided in the closure. The optical cable connection closure described in 1.

  According to a fifth aspect of the present invention, the closure main body is provided with a submergence detection module for detecting a submergence state and a maintenance core tray for storing an optical cable core used for the submergence detection module. The optical cable connection closure according to claim 1, wherein the optical cable connection closure is provided.

  In the optical cable connection closure according to the present invention, since the splitter module is rotatably attached to the engaging portion provided in the closure, in the operation of drawing the core wire in the closure, the splitter module having the tray to be operated and By rotating the other splitter modules facing the work surface in opposite directions, it is possible to secure a work space, there is no need to pull out the splitter module every time work is performed, and each tray in the splitter module Since it is not necessary to pull out even in the confirmation work, it can be done very easily.

  Furthermore, in the conventional closure, it is necessary to lengthen the extra length of the optical cable exposed to the outside of the module in order to pull out the splitter module. Of course, careful attention must be paid to the disconnection of the optical cable when pulling out the module. However, since the closure of the present invention only needs to rotate the module, the exposed portion of the core wire is very small, and there is an advantage that the possibility of the break of the core wire is very low.

  Further, since the drop tray is provided with the drop cable gripping member, and there is almost no portion where the dropped core wire is exposed in the closure, there is an advantage that the protection of the core wire is ensured. Of course, even when maintenance work or new branch work is performed, the handling of the core wire is very simple.

  Furthermore, it has a structure in which the drop cable is gripped by a groove formed in the drop cable gripping member and a rib formed in the lid, and the drop cable can be securely fixed. In particular, not only the drop cable is fitted into the groove, but also the cable is pressed by the rib of the lid, so that it can be gripped more firmly.

  Further, in the invention of claim 4, since the passing core wire and the passing holding tray for storing the holding core wire are provided, the core wire is not scattered in the closure, and later on the drop cable or the branch cable. When it is necessary to connect, it is only necessary to take out and connect the holding core wire in the tray, so that the work can be easily performed.

  Further, in the invention of claim 5, since the inundation detection module is provided in the closure, the detection module can detect inundation due to deterioration of the seal member or inundation due to damage of the closure. Etc. can be performed quickly. Furthermore, since the maintenance core tray for storing the optical cable core used for the inundation detection module is provided, there is an advantage that maintenance inspection can be performed separately from the core connection work.

It is a top view in the state where a cover member was removed among one embodiment of a closure for optical cable connection of the present invention. It is the figure which showed the AA cross section of the optical cable connection closure of FIG. It is the figure which showed the splitter module of this invention, (a) is the rear view, (b) is the left view. It is a figure of the drop tray in this embodiment. It is a figure of the drop cable holding member in this embodiment. It is a figure of the tray for branch cables in this embodiment. It is a figure of the passage reservation tray in this embodiment. It is a figure of the maintenance core wire tray in this embodiment.

  Hereinafter, an optical cable connection closure according to the present invention will be described with reference to the drawings. First, with reference to FIG.1 and FIG.2, the optical fiber connection closure 10 whole of this embodiment is demonstrated. In this embodiment, the upstream main optical cable to be introduced is A1, the derived downstream main optical cable is A2, the upstream optical cable core is B, the drop core is C, the branch cable core is D, and the passing core The wire is E, the reserved core wire is F, the maintenance core wire is G, the drop cable is H, and the branch cable is J.

  FIG. 1 is a plan view of a state in which an unillustrated cover member is removed from one embodiment of an optical cable connection closure 10 of the present invention. 2 is a cross-sectional view taken along the line AA of the plan view of FIG.

  The closure body 20 of the optical cable connection closure 10 has a horizontally long box shape, and a plurality of splitter modules 30 are stacked in the short direction. Similarly, the passage holding tray 60 and the maintenance core tray 70 are stacked.

  The splitter module 30 includes a single drop tray 40 and four branch cable trays 50 in this embodiment. The branch cable tray 50 is rotatably attached to the drop tray 40 by a tray locking portion described later.

  As shown in FIG. 2, the splitter module 30 and the closure body 20 are attached to a tray base 21 provided in the closure body 20 with a plurality of hole-like body locking portions 22. A shaft-like module locking portion 41 provided on the main body is pivotally attached to the main body locking portion 22 so as to be pivotable. For this reason, in the operation of drawing the core wire in the closure, the work space is secured by rotating the splitter module 30 having the tray to be worked on and the other splitter module 30 facing the work surface in opposite directions. Therefore, it is not necessary to pull out the splitter module 30 every time the operation is performed, and it is not necessary to pull out the trays in the splitter module 30, so that the operation can be performed very easily.

Next, the wiring state of the cable of FIG. 1 will be described.
The upstream main optical cable A1 is inserted and fixed from the left side surface of the closure body 20 according to FIG. A plurality of upstream optical cable cores B that are to be branched and drawn from the upstream main optical cable A1 are collected and wired to the respective splitter modules 30.

  The drop cable H is directly routed to and held by the drop tray 40 of the splitter module 30, and the drop core D is pulled out from the drop cable H inside the drop tray 40 and connected to the upstream optical cable core B. Since the drop cable H is directly routed to the drop tray 40, the drop core D is not exposed in the closure, and the drop core D in use is accidentally cut during branching or maintenance work. Since the possibility is very low, it can contribute to work efficiency. The internal connection state will be described later with reference to FIG.

  A branch cable J is inserted and fixed from the right side of the apparatus. A plurality of the branch cable cores D drawn from the branch cable J are gathered together, wired to the branch cable tray 50 of each splitter module 30, and connected internally. The internal connection state will be described later with reference to FIG.

  Further, the passing core E and the holding core F are wired to the passing holding tray 60, and the passing core F is inserted and fixed from the right side surface of the closure body 20 in FIG. Returned to the downstream main optical cable A2. The holding core F is stored in the passing holding tray 60 through all the cores. The internal connection state will be described later with reference to FIG.

Next, the splitter module 30 which is a constituent member of the optical cable connection closure of the present invention will be described with reference to FIG. The splitter module 30 includes a drop tray 40 that stores a core wire that branches to a drop cable H, and a branch cable tray 50 that stores a core wire that branches to a branch cable J.
In this embodiment, the drop tray 40 is composed of one sheet and the branch cable tray 50 is composed of a total of five sheets. In the branch cable tray 50, a locking portion 51 provided at the lower portion of the tray is rotatably attached to a tray locking shaft 42 provided at the lower portion of the drop tray 40. As a result, the work surface can be exposed upward by simply rotating the tray, so that it is not necessary to remove the splitter module 30 and the work is simplified.

Next, the drop tray 40 and the drop cable gripping member 46, which are one of the constituent members of the splitter module 30, will be described with reference to FIGS.
As shown in the front view of FIG. 4, the drop tray 40 is provided with drop cable gripping members 46 that grip the drop cable H on both sides of the tray. This makes it possible to process a larger number of drop cables H with one module. In addition, there is an advantage that the drop cable gripping member 50 can be provided on both sides even when the drop cable H can be laid only in one direction depending on the laying place of the closure 10. In FIG. 4, the lid 46c of the drop cable gripping member 46 is removed to show the wiring state.

  A pair of shaft-shaped module locking portions 41 are provided at the lower portion of the drop tray 40, and the module locking portions 41 allow the splitter module 30 to be pivotally mounted in the closure. . In addition, tray locking shafts for pivotally mounting the branch cable tray 50 so as to be pivotable are provided in pairs at four positions on the left and right. Since the splitter module 30 in this embodiment is equipped with four branch cable trays 50, each of them is attached to be rotatable.

As shown in the side view of FIG. 5, the drop cable gripping member 46 provided at both ends of the drop tray 40 includes a gripping portion 46a in which a groove 46b for gripping the drop cable H is formed, and a lid portion 46c in which a rib 46d is provided. Is connected to the hinge 46e so that it can be freely opened and closed.
When the lid portion 46c is closed in a state where the drop cable H is fitted in the groove 46b of the gripping portion 46a, the rib 46d is closed while pressing the upper surface of the drop cable H, so that it can be fixed securely. Thereby, even if the drop cable H is pulled during the laying work or maintenance work of the drop cable H, there is no fear of being pulled out from the drop tray 40, that is, the inner drop core C is reliably protected. There is an advantage that can be.

  In addition, a fusion holder 43 is attached to the drop tray 40, and the upstream optical cable core B and the drop core C are connected via a fusion sleeve 44. The connection is not limited to the connection by the fusion sleeve 44, and may be connected by other methods.

  As for the wiring state of the core wire inside the drop tray 40, the core wire may be introduced from the opening 45b or the opening 45c, but is stored in the branch cable tray 50 as shown in FIG. 4 of this embodiment. A method may be used in which a part of the upstream optical cable core B is introduced and connected through the opening 45a. In the wiring method of the present embodiment, the extra lengths of the core wires are not collected in the drop tray 40, so that there is an advantage that a large number of fusion operations can be easily performed. Further, since the tongue piece portion 47 is provided and the core wire can be hooked, not only the wiring work is simple, but also a lid is unnecessary.

Next, the branch cable tray 50, which is one of the components of the splitter module 30, will be described with reference to FIG. The branch cable tray 50 is provided with a pair of locking portions 51 for pivotally pivoting with the drop tray 30 at the bottom. Since the branch cable trays 50 are stacked and the respective locking portions are pivotally attached to the drop tray, the corresponding locking portions 51 and the tray locking shafts 41 are shifted from each other as shown in FIG. .
Further, at both lower ends, an opening 52 for introducing the upstream optical cable core B and an opening 53 for introducing the branch cable core D drawn from the branch cable J are provided.
Further, a splitter 54 for connecting the core wires may be provided, and a structure in which the fusion sleeve 55 can be attached may be employed.

  The wiring state of the core wire inside the branch cable tray 50 is that the upstream optical cable core B introduced from the opening 52 is hooked by the tongue piece 56 while the extra long core wire is accommodated and connected to the splitter 54. . A branch cable core D is introduced from the opening 53 on the opposite side, and the extra long core is stored while being hooked by the tongue piece 56 and connected to the splitter 54.

  A part of the introduced upstream optical cable core B is wired to the drop tray 30 and connected to the drop core C.

  Alternatively, some upstream optical cable cores B can be fanned out by the fusion sleeve 55 and wired to other stacked branch cable trays 50.

  Next, the passage holding tray 60 will be described with reference to FIG. The passage holding tray 60 is provided with a pair of locking portions 61 for pivotally mounting on the main body locking portion 22 of the closure main body 20 at the lower portion. Further, an opening 62 for introducing the passing core wire E and the holding core wire F and an opening 63 for deriving the passing core wire E are provided at both lower ends. Since the holding core wire F is stored inside the tray, the opening 63 is not led out. In the present embodiment, two pass holding trays 60 are attached, but only one pass may be attached depending on the number of core wires, or a structure in which three or more pass reserve trays 60 are attached.

Next, the maintenance cord tray 70 will be described with reference to FIG. The maintenance core wire tray 70 is provided with a pair of locking portions 71 for pivotal attachment with the closure body 20 at the bottom. The maintenance core wire tray 70 may be pivotally mounted, or may be simply attached so as to be removable.
In addition, openings 72 and 73 through which the maintenance core G is led out are provided at both lower ends. The maintenance core G is connected to the inundation detection module 74, and when the inside of the apparatus is submerged, an alarm can be transmitted to the outside through the maintenance core G.

A1 Upstream main optical cable A2 Downstream main optical cable B Upstream optical cable core C Drop core D Branch cable core E Passing core F Retention core G Maintenance core H Drop cable J Branch cable 10 Optical cable connection closure 20 Closure Main body 21 Tray base 22 Main body locking portion 22
30 Splitter Module 40 Drop Tray 41 Module Locking Section 42 Tray Locking Shaft 43 Fusing Holder 44 Fusing Sleeve 45a-45c Opening 46 Drop Cable Gripping Member 46a Gripping Part 46b Groove 46c Lid Part 46d Rib 47 Tongue Piece 50 Branching Cable tray 51 Locking portion 52, 53 Opening portion 54 Splitter 55 Fusion sleeve 56 Tongue piece portion 57 Fan-out core wire 60 Passing holding tray 61 Locking portion 62, 63 Opening portion 70 Maintenance core wire tray 71 Locking portion 72 73 Opening 74 Flooding detection module

Claims (5)

An optical cable connection closure for connecting an upstream optical cable core and a downstream optical cable core,
In the closure body,
A drop tray for connecting the upstream optical cable core and the downstream drop core drawn from the drop cable;
A branch cable tray for connecting the upstream optical cable core and the downstream branch cable core drawn from the branch cable;
A splitter module with
A closure for connecting an optical cable, wherein a plurality of the splitter modules are pivotally attached to a locking portion provided in the closure body and are stacked.   The optical cable connection closure according to claim 1, wherein the drop tray is provided with a drop cable gripping member for gripping the drop cable. The drop cable gripping member is composed of a grip portion in which a groove for gripping the drop cable is formed on one surface, and a lid portion that covers the grip portion so as to be freely opened and closed.
The lid portion has a rib formed on a surface facing the grip portion,
A configuration in which the rib presses the drop cable and fixes the drop cable to the gripping portion by covering the gripping portion with the lid in a state where the drop cable is fitted in the groove of the gripping portion. The optical cable connection closure according to claim 2, wherein the optical cable connection closure is provided.   In the closure body, there are a passing core wire that passes without branching in the closure, and a holding core wire in a state where the cut upstream optical cable core is held without being connected to the downstream optical cable core. The optical cable connection closure according to any one of claims 1 to 3, wherein a passage holding tray for storing the cable is pivotally attached to a locking portion provided in the closure.   5. The intrusion detection module for detecting an inundation state and a maintenance core tray for storing an optical cable core used in the inundation detection module are provided in the closure body. The closure for optical cable connection of any one of Claims.

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