JP4796178B2 - Optical module guide and closure - Google Patents

Description

  The present invention relates to an optical module guide and a closure attached to an optical wiring tray as a guide for an optical module.

  2. Description of the Related Art In recent years, a form called FTTH (Fiber To The Home) that directly draws an optical fiber to a subscriber's house has been adopted as a network using an optical cable. In this FTTH, from a few cores to several tens of optical cables wired in the vicinity of a subscriber's home as a network of a telecommunications carrier, it is branched into, for example, a required number of optical drop cables of about 1 to 2 cores by a closure. Pull into the network subscriber's home.

  As a closure used for such FTTH, a connector holding portion that holds a plurality of connectors for connecting optical fiber cores of a trunk optical cable and an optical drop cable, and an extra length that accommodates an extra length of the optical fiber core wire 2. Description of the Related Art A tray having a housing portion, a splitter tray that houses an optical module such as a splitter, and the like are stacked and attached inside (for example, see Patent Document 1).

JP 2007-121603 A

With the promotion of FTTH, the demand for drawing an optical fiber is increased, and a large number of optical drop cables are pulled out from the closure, so that the number of optical splitters accommodated in the splitter tray is also increased.
By the way, a smaller one is being used as the optical splitter accommodated in the splitter tray. In the case where a large number of optical splitters are added, it is desired to accommodate the miniaturized optical splitters at high density and to effectively use the limited space of the splitter tray in the closure.

  An object of the present invention is to provide an optical module guide and a closure capable of accommodating an optical module such as an optical splitter at a high density in a tray in an already laid closure.

The optical module guide of the present invention capable of solving the above problems is an optical module guide attached to an optical wiring tray,
A frame member capable of fitting a plurality of optical modules;
A wiring portion in which an optical fiber passage is formed for each optical module,
By selecting a mounting surface for the optical wiring tray, the optical wiring tray can be mounted on either the left or right side of the optical wiring tray.

  In the optical module guide according to the aspect of the invention, it is preferable that the wiring portion is provided with a cover that covers the passage.

  Further, the closure of the present invention is characterized in that the optical wiring trays in which the optical module can be accommodated by the optical module guide described in any one of the above are stacked and accommodated in a plurality of stages.

According to the optical module guide of the present invention, a plurality of optical modules can be fitted into the frame member and can be easily attached to either or both of the left and right of the optical wiring tray. Further, the optical fiber drawn from the optical module to be mounted can be easily wired by passing it through the passage of the wiring portion.
By mounting optical modules on both the left and right sides of the optical wiring tray using this optical module guide, the number of optical modules mounted in a limited space of the optical wiring tray can be greatly increased. Therefore, optical modules such as an optical splitter can be accommodated in a high density in the optical wiring tray in the already laid closure.
Further, according to the closure of the present invention, even if the demand for drawing an optical fiber increases due to the promotion of FTTH, it is possible to easily cope with the demand by increasing the number of optical modules mounted.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows one Embodiment of the closure provided with the optical module guide which concerns on this invention, Comprising: (a) is the top view which looked at one part in cross section, (b) is a longitudinal cross-sectional view, (c) is a cross-sectional view. It is. It is a figure which shows the accommodation state of the termination tray and splitter tray in the closure of FIG. 1, Comprising: (a) And (b) is a side view, respectively. It is a perspective view which shows the structure of the splitter tray accommodated in the closure of FIG. It is a perspective view of the state which opened the extra length accommodation tray and optical module accommodation tray of the splitter tray of FIG. It is a top view which shows the optical module accommodation tray of the splitter tray of FIG. It is a top view explaining the structure of the optical module guide of this embodiment. It is a perspective view which shows the structure of the optical module guide of this embodiment. It is a top view which shows the structure of the optical module guide of this embodiment. It is a top view which shows the structure of the optical module guide of this embodiment. It is a figure which shows the form of mounting | wearing of the optical splitter by the optical module guide of this embodiment, Comprising: (a)-(c) is a top view of the optical module accommodation tray of a splitter tray, respectively.

Hereinafter, an example of an embodiment of an optical module guide and a closure according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the optical cable connection closure 11 includes a case main body 12 whose front and rear surfaces can be opened, and the inside of the case main body 12 is an optical cable housing space 15.

Cable outlets 16 and 17 are provided at both ends of the closure 11, and the trunk cable optical cable 21 and a drop cable 22 for drawing into each subscriber's house can be led in and out by the cable outlets 16 and 17. It is said that.
The cable lead-in / out sections 16 and 17 are attached with grommets formed of a rubber material that is in close contact with the cable to be led in / out, and rainwater or the like may enter the optical cable housing space 15 of the closure 11 through the cable. It is prevented.

In addition, a high waterproofness and light resistance can be ensured by providing a packing at the mating portion between the case body 12 and the cable lead-in / out portions 16 and 17 as appropriate, or by having a structure in which the respective edges overlap. Has been.
The trunk-system optical cable 21 drawn into the optical cable housing space 15 from the cable lead-in / out section 17 is gripped by the cable TM gripping tool 23, and the optical fiber core (optical fiber) 24 pulled down from the optical cable 21 is a connector (not shown). To the optical fiber core 24 of the drop cable 22 via the splitter tray 34 and the termination tray 33.

  In the optical cable housing space 15 of the closure 11, a tray fixing base 31 arranged in the vertical direction is provided. A tray storage case 32 is attached to the tray fixing base 31, and a plurality of termination trays 33 and splitter trays 34, which are a plurality of optical wiring trays, are stacked and stored in the tray storage case 32. Has been. The termination tray 33 accommodates the connecting portion and the extra length portion of the optical fiber core wire 24, and the splitter tray 34 accommodates an optical splitter that branches the optical signal.

As shown in FIG. 2A, the tray storage case 32 is formed with a plurality of stages of tray storage portions 37 partitioned by a plurality of partition walls 36. The termination tray 33 and the splitter tray 34 are stored in the tray storage case. It is stored in each part 37.
The tray storage case 32 has a tray support portion 38 that can be pulled out to the opening side of the closure 11 (left side in FIG. 2). The end tray 33 and the splitter tray 34 are supported so that the end on the back side opposite to the opening side of the closure 11 is rotatable with respect to the tray support portion 38 about a horizontal axis.

  When the tray support portion 38 is pulled out to the opening side of the closure 11, the termination tray 33 and the splitter tray 34 are pulled out from the tray storage portion 37 of the tray storage case 32 as shown in FIG. In this state, the termination tray 33 and the splitter tray 34 can be rotated with respect to the tray support portion 38.

  For example, when the work is performed on the termination tray 33 or the splitter tray 34, the tray on the lower side of the termination tray 33 or the splitter tray 34 to be worked is rotated downward, so that the termination tray 33 or the splitter tray to be worked on. The termination tray 33 or splitter tray 34 above 34 is rotated upward. If it does in this way, the upper surface side of the termination | terminus tray 33 or the splitter tray 34 of work object can be opened widely, and a smooth operation | work will be attained. When working with the uppermost termination tray 33, all the termination trays 33 and splitter trays 34 are rotated downward and tilted.

Next, the structure of the splitter tray and the optical module guide that can be mounted on the splitter tray will be described.
As shown in FIGS. 3 and 4, the splitter tray 34, which is an optical wiring tray, has an extra length accommodation tray 41 and an optical module accommodation tray 51 that are divided into two layers in the thickness direction. In the present embodiment, the extra length accommodation tray 41 is an upper layer, and the optical module accommodation tray 51 is a lower layer. The extra length accommodation tray 41 and the optical module accommodation tray 51 are connected to each other so as to be rotatable on the side of the connecting portion with the tray support portion 38 that is one side in the width direction.

  The surplus length accommodation tray 41 has two left and right surplus length accommodation portions 42 in the longitudinal direction, and the extra length portion of the optical fiber core wire 24 can be accommodated in these extra length accommodation portions 42. A plurality of core wire holding pieces 43 are formed in the surplus length accommodation tray 41, and the optical fiber core wires 24 accommodated in the surplus length accommodation portion 42 are held by the extra length accommodation portions 42 while suppressing the floating. Is done.

  The optical module storage tray 51 has two left and right module mounting portions 52 to which an optical splitter (optical module) A can be mounted. The module mounting portion 52 is formed of a bottom plate 53 of the optical module receiving tray 51 and a wall portion 54 standing around the bottom plate 53, and its planar shape is substantially the same as the outer shape of the optical splitter A. The same shape. In the optical module storage tray 51, the optical splitter A is mounted on each module mounting portion 52 or any one of the selected module mounting portions 52 as required.

  At both ends of the optical module storage tray 51, openings 55 are formed by notching the wall portions 54 on the connection side with the extra length storage tray 41, and the optical fibers from the optical splitter A are formed at the openings 55. The core wire 24 is pulled out.

  On the opposite side of the splitter tray 34 where the tray support portion 38 is connected, an engagement portion 48 formed on the extra length accommodation tray 41 and an engagement claw 58 formed on the optical module accommodation tray 51 are provided. Yes. By engaging the engaging portion 48 with the engaging claw 58, the extra length accommodation tray 41 and the optical module accommodation tray 51 are engaged, and the extra length accommodation tray 41 and the optical module accommodation tray 51 are stacked. Maintained.

  As shown in FIG. 5, an optical module guide 61 can be mounted on each module mounting portion 52 of the optical module housing tray 51 constituting the splitter tray 34. The optical module guide 61 has an outer shape substantially the same as that of the optical splitter A mounted on the module mounting portion 52, and two optical splitters (optical modules) that are smaller than the optical splitter A. B is held.

  As shown in FIGS. 6 to 8, the optical module guide 61 has a frame member 62 that follows the outer shape of the optical splitter B to be held, and the frame member 62 holds the two optical splitters B respectively. A portion 63 is formed. The optical splitter B can be fitted into the holding portion 63 formed in the frame member 62.

  The frame member 62 constituting the holding portion 63 is fitted with a square hole 66 into which the rib 65 formed at the front end portion of the optical splitter B can be fitted, and a protrusion 67 formed at the rear end portion of the optical splitter B. A possible round hole 68. When the optical splitter B is fitted into the holding portion 63, the rib 65 and the protrusion 67 of the optical splitter B are fitted into the square hole 66 and the round hole 68 of the frame member 62, respectively. Retained.

  Further, the optical module guide 61 is provided with a wiring portion 71 at the end where the rear end side of the optical splitter B is disposed. In the wiring portion 71, wiring passages (passages) 72a and 72b connected to the respective holding portions 63 are formed. The wiring passages 72 a and 72 b are respectively curved and guided to a core wire lead-out portion 70 provided on one side of the optical module guide 61. When the optical splitter B is fitted into the holding portion 63 in the wiring passages 72a and 72b, the optical fiber core 24 connected to the lead-out portion 69 provided near one side at the rear end portion of the optical splitter B. Is to be inserted.

  The wiring passages 72a and 72b are provided with locking portions 73 protruding from the upper and lower edges thereof, and the optical fiber core wires 24 passed through the wiring passages 72a and 72b are locked by the locking portions 73. Lifting and slipping out of the wiring passages 72a and 72b are prevented.

  Further, covers 81 a and 81 b are rotatably connected to both ends of the wiring portion 71. The cover 81a is rotated to one surface side of the wiring portion 71 and overlapped with the wiring portion 71, whereby one surface of the wiring passages 72a and 72b is covered with the cover 81a. Further, the cover 81b is rotated to the other surface side of the wiring portion 71 and overlapped with the wiring portion 71, whereby the other surfaces of the wiring passages 72a and 72b are covered with the cover 81b.

  A plurality of engaging projections 83 are formed on the cover 81 a and 81 b on the surface facing the wiring portion 71. Further, the wiring portion 71 is formed with a plurality of engaging holes 84 into which the engaging protrusions 83 can be fitted at positions corresponding to the engaging protrusions 83 of the covers 81a and 81b. When the covers 81 a and 81 b are overlapped on the wiring portion 71 and the engaging protrusion 83 is fitted in the engaging hole 84, the covers 81 a and 81 b are engaged with the wiring portion 71 covered. Further, when the covers 81a and 81b are overlapped and engaged with the wiring portion 71, the width dimensions of the wiring passages 72a and 72b are maintained at predetermined dimensions.

  Moreover, the wiring part 71 has engagement pieces 85a and 85b that are rotatably connected to the upper and lower edges. The engaging piece 85a is rotated to one surface side of the wiring portion 71 and overlapped with the wiring portion 71 so as to straddle the wiring passage 72b. Further, the engagement piece 85b is rotated to the other surface side of the wiring portion 71 and overlapped with the wiring portion 71 so as to straddle the wiring passage 72b.

  Engagement protrusions 86 are formed on the surfaces of the engagement pieces 85 a and 85 b facing the wiring portion 71, respectively. In addition, the wiring portion 71 is formed with an engagement hole 87 into which the engagement protrusion 86 can be fitted at a position corresponding to the engagement protrusion 86 of the engagement pieces 85a and 85b. When the engagement pieces 85a and 85b are overlapped on the wiring portion 71 and the engagement protrusion 86 is fitted in the engagement hole 87, the engagement pieces 85a and 85b are engaged in a state of straddling the wiring passage 72b. . Thereby, the wiring passage 72b is maintained at a predetermined width dimension by the engagement pieces 85a and 85b together with the covers 81a and 81b.

  Further, in the covers 81a and 81b, a relief hole 88 and a relief groove 89 are formed at positions facing the locking portions 73 of the wiring portion 71 and the engaging pieces 85a and 85b superimposed on the wiring portion 71, When superimposed on the wiring portion 71, the locking portion 73 enters the escape hole 88, and the engagement pieces 85 a and 85 b enter the escape groove 89. Thereby, the covers 81a and 81b are securely overlapped with the wiring portion 71.

When the optical splitter B is held by the optical module guide 61 having the above structure, either one of the covers 81a and 81b of the optical module guide 61 is folded back and engaged with the wiring portion 71, and the overlapped side is defined as the lower surface. To do. Moreover, the side used as the lower surface of engagement pieces 85a and 85b is also turned back.
Here, as shown in FIG. 9, the cover 81b is folded back and the side on which the cover 81b is folded is described as the lower surface.
If it does in this way, it will be in the state where the lower side of wiring passages 72a and 72b of wiring part 71 was covered with cover 81b, and the width of wiring passage 72b is secured by this cover 81b and engagement piece 85b.

In this state, the optical splitter B is fitted and attached to each holding portion 63, and the optical fiber core 24 connected to the lead-out portion 69 of each optical splitter B is inserted into the respective wiring paths 72a and 72b. .
Thereafter, the upper cover 81a is folded back and overlaid on the upper surface of the wiring portion 71 to cover the wiring passages 72a and 72b, and the engagement piece 85a is folded back.

In this way, the two optical splitters B can be easily attached to the optical module guide 61.
The optical module guide 61 on which the optical splitter B is mounted selects the mounting surface with respect to the optical module storage tray 51 of the splitter tray 34, so that either of the left and right module mounting portions 52 of the optical module storage tray 51 can be selected. Can be installed.

For example, as shown in FIG. 10A, the optical module guide 61 can be mounted on the module mounting portion 52 on the right side of the optical module receiving tray 51, and the optical module guide 61 is turned over so that the mounting surface is reversed. Thus, as shown in FIG. 10B, the optical module guide 61 can be mounted on the module mounting portion 52 on the left side of the optical module storage tray 51.
Furthermore, as shown in FIG. 10C, the two optical module guides 61 can be mounted on the respective module mounting portions 52 of the optical module storage tray 51 with the mounting surfaces reversed.

  The optical module guide 61 is an optical module in which one of the covers 81a and 81b and the engaging portions 85a and 85b is folded back and engaged with the wiring portion 71 with the overlapped side as the lower surface. You may mount in the module mounting part 52 of the storage tray 51. FIG. In this case, the optical splitter B is fitted and attached to the holding part 63 of the optical module guide 61 attached to the module attaching part 52, and the optical fiber core wires 24 connected to the lead-out parts 69 of the respective optical splitters B are respectively connected. The wiring passages 72a and 72b are inserted, and then the upper side of the covers 81a and 81b is folded and overlapped on the upper surface of the wiring portion 71 to cover the wiring passages 72a and 72b, and the engagement piece 85a is folded back. It becomes.

  In this case, the two optical splitters B can be easily mounted on the optical module guide 61 mounted in advance on the module mounting portion 52 of the optical module storage tray 51.

  When the optical module guide 61 is mounted on the module mounting portion 52 of the optical module receiving tray 51, the core wire lead-out portion 70 of the optical module guide 61 is not opened without interfering with the wall portion 53 of the module mounting portion 52. 55.

According to the optical module guide 61 according to the present embodiment, a plurality of optical splitters B are fitted into the holding portion 63 of the frame member 62 and can be easily attached to either or both of the left and right module mounting portions 52 of the optical module accommodation tray 51. Can be installed.
Further, the optical fiber core wire 24 drawn from the optical splitter B to be attached can be easily wired by passing it through the wiring passages 72 a and 72 b of the wiring portion 71.

Further, if the optical splitter B is mounted on both the left and right sides of the optical module receiving tray 51 using the optical module guide 61, the number of the optical splitter B mounted in the limited space of the optical module receiving tray 51 is greatly increased. be able to. Therefore, the optical splitter B can be accommodated in the optical module accommodation tray 51 in the already installed closure 11 with high density.
Specifically, by using the optical module guide 61 with respect to one optical module receiving tray 51 to which two optical splitters A can be attached, four small-type optical splitters B can be easily attached. .

And according to the closure of the said embodiment, even if the request | requirement which draws in an optical fiber by promotion of FTTH increases, it can respond to the request | requirement easily by increasing the number of attachment of the optical splitter B. FIG.
In the above-described embodiment, the case where the optical splitter is accommodated as an example of the optical module has been described. However, the present invention is not limited to the optical splitter, and the light such as a fan-out module that spreads and distributes a plurality of optical fiber core wires. The present invention can also be applied when housing a module.

  11: Closure, 24: Optical fiber core wire (optical fiber), 51: Optical module storage tray (optical wiring tray), 61: Optical module guide, 62: Frame member, 71: Wiring section, 72a, 72b: Wiring path (Passage), 81a, 81b: cover, A, B: optical splitter (optical module)

Claims (3)

An optical module guide attached to an optical wiring tray,
A frame member capable of fitting a plurality of optical modules;
A wiring portion in which an optical fiber passage is formed for each optical module,
An optical module guide that can be mounted on either the left or right side of the optical wiring tray by selecting a mounting surface for the optical wiring tray. The optical module guide according to claim 1,
An optical module guide, wherein the wiring portion is provided with a cover that covers the passage.   3. A closure in which the optical wiring tray, in which the optical module can be accommodated by the optical module guide according to claim 1 or 2, is stacked and accommodated in a plurality of stages.

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