JP2011237837A - Closure for optical cable connection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a closure for optical cable connection capable of housing sufficiently long extra length of an optical drop cable.SOLUTION: A closure 10 for an optical cable connection comprises a closure body 11 housing a connection part 34 to which an optical connector 42 and a lid 12 openably and closably provided to the closure body 11. A support plate 31 is detachably provided in the closure body 11. On the support plate 31, the connection part 34 having a plurality of adapters 33 for connecting optical connectors 42 is provided. Each of the adapters 33 has one end side as a connection port 33a for connecting the optical connector 42, and is turnably linked in such a manner that the other end side may turn around a shaft part 35 formed on the support plate 31 to be obliquely directed from the state parallel to the plane direction of the support plate 31 to the state that the connection port 33a is spaced apart from the support plate 31.

Description

  The present invention relates to an optical cable connection closure for connecting a trunk optical cable and an optical drop cable.

  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, the core wires drawn from the ends of the trunk optical cable and the branch optical cable are fused and connected, and the excess length of the connection portion and the core wire is stored in the extra length storage portion. A connector holding part for holding a plurality of connectors for connecting optical fiber core wires provided at the center part of the box body and drawn from the ends of the trunk optical cable and the branching optical cable; There is a known one having an extra length accommodating portion that is arranged on each of the front and back sides of the both sides and accommodates the extra length portion of the core of the optical fiber in a wound state (for example, see Patent Document 1). .

  In addition, a tray in which a drop tray capable of individually storing the connector and the extra length of the optical fiber separately for each optical fiber branched from the optical fiber is superposed on the inner holder so as to be detachable. Closures are also known (see, for example, Patent Document 2).

JP-A-8-227018 JP 2002-221623 A

  By the way, in recent years, a connector connection is sometimes used instead of a fusion connection to connect an optical drop cable in order to make the work less skillful and facilitate the connection change. Further, in this case, since the optical connector is directly attached to the optical drop cable at the site, it is necessary to provide the optical drop cable with an extra length that assumes failure of terminal processing for attaching the optical connector.

  However, the above-mentioned closure can store some extra length on the tray, etc. However, in the case of an optical drop cable, the cable has a large cross-sectional area and high rigidity, so it is wound around a small radius of curvature. It is difficult to do so, and there is no space for storing a failure failure length long enough to handle a sufficient number of failures.

  An object of the present invention is to provide an optical cable connection closure capable of accommodating a sufficient length of an optical drop cable.

An optical cable connection closure according to the present invention capable of solving the above-mentioned problems is an optical cable connection comprising a main body that houses a connection portion to which an optical connector is connected, and a lid that can be opened and closed with respect to the main body. A closure for
A support plate is detachably provided in the main body,
The support plate is provided with the connection portion having a plurality of adapters for connecting the optical connector,
One end side of the adapter is a connection port for connecting the optical connector, and the other end side is centered on a shaft portion formed on the support plate, and the connection port extends from a state along the surface direction of the support plate. It is connected so that it may turn to the diagonal direction which leaves | separates from a support plate so that rotation is possible.

  It is preferable that the adapter is rotatable from a state along the surface direction of the support plate to an inclined direction in which the connection port is separated from the support plate and inclined at an angle of 45 °.

According to the optical cable connection closure of the present invention, the cover that can be opened and closed with respect to the main body is provided with the extra length storage part that can accommodate the extra length part of the optical drop cable. The extra length part of the optical drop cable connected to the part can be easily accommodated in the extra length accommodating part. As a result, even if the terminal processing of the optical drop cable is performed by securing a sufficient extra length assuming the failure of the terminal processing, the extra length can be securely stored. As a result, the storage space is small, so it is not possible to secure a sufficient length, and it is possible to solve the problem that it becomes difficult to connect to the connection part due to the shortage of the optical drop cable due to the terminal processing failure. it can.

It is a figure which shows an example of the structure of the closure for optical cable connection of this invention, and is a top view of the closure of the state which opened the cover body. It is a front view of the support plate provided in a closure main body. It is a side view of the support plate provided in a closure main body. It is a side view of the support plate which shows the movement of the connection part provided in the support plate.

  Hereinafter, an example of an embodiment of an optical cable connection closure according to the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view of a closure in a state in which a lid showing the structure of an optical cable connection closure of the present invention is opened, FIG. 2 is a front view of a support plate provided in the closure body, and FIG. 3 is provided in the closure body. FIG. 4 is a side view of the support plate showing the movement of the connecting portion provided on the support plate.

As shown in FIG. 1, the optical cable connection closure 10 of the present invention has a closure body 11 and a lid 12.
The closure body 11 and the lid body 12 are made of hard resin, and the bottom portion is rotatably connected by a hinge 13. Thereby, the inside of the closure main body 11 is opened and closed by rotating the lid 12 by the hinge 13.

  Further, the closure body 11 and the lid body 12 are provided with a locking mechanism 14 including engaging portions 14a and 14b that engage with each other at the upper part thereof. The closure body 11 is closed by the lid body 12 by rotating the lid body 12 toward the closure body 11 and closing the closure body 11 by engaging and locking the engaging portions 14a and 14b. Maintained in a state.

  A support line 15 is passed through the closure body 11 in the vicinity of the upper part. Further, the closure body 11 is provided with a fixing metal 16 at the upper part in the vicinity of both ends. By fixing the fixing metal 16 to the support wire 15, the closure main body 11 is fixed to the support wire 15 and supported in an aerial manner. .

  In addition, a trunk-system optical cable 21 is drawn into the closure main body 11 below the support line 15 in the vicinity of the upper portion, and this optical cable 21 is supported by a cable support portion 22 provided below the fixing bracket 16. Has been.

A support plate 31 is detachably provided in the closure body 11. The support plate 31 includes a splitter 32 on one end side, and a connection portion 34 having a plurality of adapters 33 arranged in a row is provided at the center.
The splitter 32 is connected to the optical cable 21 drawn into the closure main body 11 and branched into a plurality of branches, and each branch line (not shown) is led to the adapter 33 of the connection portion 34.

  As shown in FIGS. 2 and 3, the adapter 33 constituting the connection portion 34 provided on the support plate 31 has a connection port 33 a at one end side, and the shaft portion 35 formed on the support plate 31 is the center. It is connected so as to be rotatable. Accordingly, the connection portion 34 is about 30 to 45 degrees from the state along the surface direction of the support plate 31 so that the connection port 33a faces in an oblique direction away from the support plate 31 as shown in FIG. It is possible to rotate in a state inclined at an angle of.

By connecting the optical connector 42 attached to the optical drop cable 41 to the connection port 33a of the adapter 33 of the connection portion 34 to the connection port 33a of the adapter 33, the branch line branched from the optical cable 21 and the optical drop cable 41 Are optically connected.
In addition, the support plate 31 is provided with a wiring routing portion 43 through which the optical drop cable 41 is routed.

  Locking claws 51 are formed at three locations on the inner surface of the lid 12, and the optical drop cable 41 is configured to be latched between the locking claws 51 and the inner surface of the lid 12. Yes. As a result, the surplus length portion 41 a obtained by winding the optical drop cable 41 in an annular shape is locked by the locking claw 51, whereby the surplus length portion 41 a of the optical drop cable 41 is held on the inner surface of the lid 12. That is, the lid 12 is provided with an extra length storage portion 52 capable of accommodating the extra length portion 41a of the optical drop cable 41 on the inner surface thereof.

  A cable holding member 54 having a cable holding groove 53 is provided on both sides of the support plate 31 in the closure main body 11, and the optical drop cable 41 is engaged with the cable holding groove 53 of the cable holding member 54. It is possible to stop.

  Further, waterproof members 55 made of rubber or the like are provided at both ends of the closure body 11. A plurality of insertion holes (not shown) are formed in the waterproof members 55, and the support line 15, the optical cable 21, and the optical drop cable 41 are inserted therethrough. When the lid 12 is closed with respect to the closure main body 11, the waterproof member 55 is compressed, thereby sealing the insertion hole through which the support wire 15, the optical cable 21, and the optical drop cable 41 are passed, and the closure main body. 11 and the lid 12 are sealed at both ends.

  In the closure 10 having the above structure, when the optical drop cable 41 is pulled into the subscriber's home of the network, the operator first releases the lock by the lock mechanism 14 and rotates the lid 12 to open the closure body 11.

  When the closure body 11 is opened, the optical connector 42 attached to the optical drop cable 41 at the site is inserted into the adapter 33. At this time, there is a problem in the attachment of the optical connector 42 to the optical drop cable 41, and when it is attached again, the end of the optical drop cable 41 that has failed to be attached is cut to some extent. Therefore, the operator assumes a failure in attaching the optical connector 42 and attaches the optical connector 42 while securing a sufficient extra length.

  When the optical connector 42 is attached to the optical drop cable 41, the optical connector 42 attached to the optical drop cable 41 is connected to the adapter 33 of the connection portion 34 of the closure body 11.

  Further, the extra length portion 41a of the optical drop cable 41 is wound and held in the extra length storage portion 52 on the inner surface of the lid body 12 by the locking claws 51, and then the closure body 11 is closed by rotating the lid body 12. The lock mechanism 14 locks.

  As described above, according to the optical cable connection closure of the above-described embodiment, the extra length storage portion 52 in which the extra length portion 41 a of the optical drop cable 41 can be accommodated in the lid body 12 that can be opened and closed with respect to the closure main body 11. Therefore, the extra length portion 41a of the optical drop cable 41 connected to the adapter 33 of the connection portion 34 by performing terminal processing for attaching the optical connector 42 can be easily accommodated in the extra length accommodating portion 52. As a result, even if the terminal processing of the optical drop cable 41 is performed by securing a sufficient extra length assuming failure of the terminal processing for attaching the optical connector 42, the extra length can be securely stored.

  Thereby, since the storage space is small, a sufficient length cannot be secured, and the length of the optical drop cable 41 is insufficient due to the failure of the terminal processing for attaching the optical connector 42, making it difficult to connect the connection portion 34 to the adapter 33. It is possible to eliminate such a problem.

  Further, the surplus length portion 41a that is locked by the locking claw 51 and stored in the surplus length storage portion 52 can be easily extracted from between the locking claw 51 and the inner surface of the lid body 12, and can be taken out. Thus, even when the optical drop cable 41 is replaced, the extra length portion 41a of the optical drop cable 41 to be replaced can be taken out without obstruction such as an increase in transmission loss with respect to other connected optical drop cables 41. it can.

  Further, the connecting portion 34 is rotatable from a state along the surface direction of the support plate 31 to an inclined state so that the connection port 33 a faces an oblique direction away from the support plate 31. Therefore, when the optical connector 42 is inserted into and removed from the adapter 33 of the connecting portion 34, the adapter 33 is inclined at a narrow pitch to save space by inclining the connection port 33a so as to face away from the support plate 31. Even if they are arranged, it is possible to facilitate the work of inserting / removing the optical connector 42 to / from each adapter 33. In particular, the adapters 33 and the optical connector 42 are not forcibly inserted / removed even if the adapters 33 are located on both sides where insertion / removal is difficult due to other components. In addition, the optical connector 42 can be easily and safely inserted and removed without using a dedicated tool, and workability can be improved.

10: closure for optical cable connection, 11: closure main body (main body), 12: lid, 21: optical cable (main-system optical cable), 34: connection part, 41: optical drop cable, 41a: extra length part, 52: extra length Storage

Claims (2)

A closure for connecting an optical cable, comprising: a main body that houses a connection portion to which an optical connector is connected; and a lid body that can be opened and closed with respect to the main body.
A support plate is detachably provided in the main body,
The support plate is provided with the connection portion having a plurality of adapters for connecting the optical connector,
One end side of the adapter is a connection port for connecting the optical connector, and the other end side is centered on a shaft portion formed on the support plate, and the connection port extends from a state along the surface direction of the support plate. An optical cable connection closure characterized in that it is rotatably connected so as to face in an oblique direction away from the support plate. The optical cable connection closure according to claim 1,
The adapter is rotatable from a state along the surface direction of the support plate to a state in which the connection port is inclined to an angle of 45 ° in an oblique direction away from the support plate. Connection closure.

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