JP2008052195A - Optical termination unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve workability in attaching/detaching an optical connector when an optical cord is switched. <P>SOLUTION: An optical termination unit includes a first cord placing tray 15 on the unit front side on which an optical connector-attached optical cord 2 extending to the front of the unit is placed and a second cord placing tray 16 on the side of the unit. The second cord placing tray 16 is provided with a guide 21 at a position on the unit front side of the tray body 20 for placing the optical cord 2 and with a clamp 22 at a position on the unit rear side. The width W of the tray body 20 is wide to the extent allowing the optical cord 2 to be laid out with an extra length between the guide 21 and the clamp 22. In switching the optical cord, since the extra length of the optical cord 2 is on the second cord placing tray 16, the optical cord 2 can be drawn to the right side in Fig. 2 to have a sag on the unit front side. This facilitates handling of the optical cord 2 around the target optical connector, improving workability in attaching/detaching the optical connector. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an optical termination unit in which a large number of optical cords with optical connectors are connected to optical fibers inside the unit by an adapter arranged vertically and horizontally on the front surface of the unit.

As an optical termination unit that connects the optical fiber on the line side and the optical fiber on the apparatus side in a switchable manner, as shown in FIGS. 8 and 9, the optical connector 3 at the tip of the optical cord 2 with an optical connector is installed inside the unit. There is an optical termination unit 1 in which a large number of adapters 5 for connecting an optical fiber to a connector (unit side optical connector is indicated by 4) are arranged vertically and horizontally on a unit front surface (front plate) 6. In this type of optical termination unit 1, an optical cord with an optical connector (hereinafter sometimes simply referred to as an optical cord in some cases) 2 extending forward (downward in FIG. 9) from the unit front surface 6 is a cord provided on the front side of the unit. In general, the cord bundle is placed on the placing tray 7 and guided sideways, held by a clamp 8 and hung downward. Further, as in some optical cords 2 in the illustrated example, there is a case in which the cord bundle is pulled to the side of the unit, placed on the cord placing table 9, gripped by the clamp 10, and hung downward (see FIG. 1). 1 to 3). This type of optical termination unit 1 is installed in multiple stages in an optical distribution board, for example, in the case of a large-capacity type optical distribution board installed in a station building.
JP 2001-133636 A

  When the optical cord 2 is switched (switching of the optical wiring system) in the optical termination unit 1, the optical cord 2 is inserted / extracted. The adapter 5 is attached and detached. If the number of optical cords 2 is small, there is no particular problem. However, in the case of the optical termination unit 1 with high-density wiring as shown in the figure, a very large number of optical cords 2 extend forward from the front surface 6 of the unit. Since the optical cord 2 around the optical connector 3 to be attached / detached becomes an obstacle, it is difficult to attach / detach the connector using the connector attaching / detaching tool, and the workability is poor. In particular, since the optical cord 2 is in a tensioned state by being pulled to the entrance / exit side (left side in FIGS. 8 and 9), the light around the optical cord 2 can be easily operated with the connector attaching / detaching tool. It is not easy to crawl (or scrape) the code well, and the workability is poor.

  When the connector is attached or detached, if the clamp 8 or 10 holding the optical cord is released, the optical cord 2 is loosened, and the optical cord 2 is held again by the clamp 8 or 10 in this state, the attachment or detachment is performed. The optical cord 2 around the optical connector 3 to be tried can be easily wound, but if the clamp is released and re-clamped, the workability is poor.

In general optical wiring boards, when switching the optical code, one of the trays stacked in the vertical direction of the wiring rack may be used as a tray for storing the optical code extra length. Is not good.
Also, in general optical distribution boards, there is a structure with a wiring work shelf that can be rotated and pulled out horizontally from the optical termination unit. Becomes complicated.

  The present invention has been made to eliminate the above-mentioned conventional drawbacks, and has a very simple structure, and when switching an optical cord, the surrounding optical cord can be wired so that the optical connector can be easily attached / detached by a connector attaching / detaching tool. An object is to provide an easy optical termination unit.

The present invention that solves the above problems is an optical termination unit in which a large number of optical cords with optical connectors are connected to optical fibers inside the unit by an adapter arranged vertically and horizontally on the front of the unit,
A first cord placing tray on the front side of the unit on which the optical cord with the optical connector extending in front of the unit is placed, and the optical connector being routed from the first cord placing tray to the side of the unit. A second cord placing tray on the side of the unit on which the optical cord is placed, and
The second cord placing tray has a guide for guiding the optical cord with the optical connector drawn from the first cord placing tray to the unit front side position of the tray body on which the optical cord with the optical connector is placed. And a clamp that can grip an optical cord with an optical connector that is hung down from the second cord placement tray at a position on the rear side of the unit,
The width W and the length L of the tray main body have a wide width and a long length that allow the optical cord with an optical connector to be stretched between the guide and the clamp. To do.

  According to a second aspect of the present invention, the first cord mounting tray in the optical termination unit of the first aspect can be rotated downward with respect to the main body side portion fixed to the unit main body and the main body side portion during the connector attaching / detaching operation. It is characterized in that it is divided into a front side portion hinged to the front side.

In the optical termination unit of the present invention, the optical cord with an optical connector extending forward from the front of the unit is placed on the first cord mounting tray on the front side of the unit, and is routed to the side of the unit to be second. The cord is placed on the second cord placing tray, and is gripped by a clamp at the position on the rear side of the unit in a state of being wound on the second cord placing tray, for example, in an S-shape and having a surplus length.
At the time of switching the optical cord, there is an extra length of the optical cord with the optical connector on the second cord placing tray, so that it is pulled to the second cord placing tray side (for example, the left side) when viewed from the front of the unit It is possible to draw the optical cord with an optical connector at the opposite side (right side). Therefore, the optical cord with the optical connector can be loosened substantially in front of the unit. For this reason, it is easy to pick up an optical cord with an optical connector near the optical connector to be attached / detached so that it is easy to grasp the optical connector with a connector attaching / detaching tool. Workability is improved.

  An optical termination unit embodying the present invention will be described below with reference to the drawings.

1 is a front view of an optical termination unit 11 according to an embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a left side view thereof, and FIG. 4 is a right side view thereof. The optical termination unit 11 of the embodiment is installed in multiple stages in a large capacity type optical wiring board 7 as schematically shown in FIG. 7, for example. In this optical termination unit 11, a large number of adapters 5 for connecting the optical connector 3 at the tip of the optical cord 2 with an optical connector to the unit-side optical connector 4 are arranged vertically and horizontally on the unit front surface 6. The optical fiber 12 a taken out from the optical cable 12 on the line side is fusion-bonded at the fusion unit 14 with the optical fiber 13 to which the unit-side optical connector 4 is attached. The optical connector 3 attached to the tip of the optical cord 2 is fitted to the adapter 5 and connected to the unit side optical connector 4.
In the illustrated example, the fusion unit 14 is provided below the first code placement tray 15, but it may be arranged on the first code placement tray 15.

  The optical termination unit 11 includes a first cord placement tray 15 on the front side of the unit on which the optical cord with an optical connector (hereinafter sometimes referred to as an optical cord) 2 extending in front of the unit is placed, and the first cord And a second cord placing tray 16 on the side surface of the unit on which the optical cord 2 routed from the placing tray 15 to the side surface of the unit is placed. The first cord loading tray 15 includes a main body side portion 17 fixed to the unit main body 23 and a front side portion 18 hinged to be rotatable downward with respect to the main body side portion 17 when the connector is attached / detached. It is divided into and. The hinge portion 19 includes a lock mechanism that keeps the front side portion 18 horizontal, and the front side portion 18 can be rotated downward by releasing the lock. The front side portion 18 of the first cord loading tray 15 has a front wall 18a that prevents the optical cord 2 from protruding from the end edge thereof.

The second cord placing tray 16 is fixed to the side surface of the unit main body 23, and the first cord placing tray 16 is positioned at the front side of the tray main body 20 on which the optical cord 2 is placed (the lower side in FIG. 2). A guide 21 that guides the optical cord 2 routed from the cord placing tray 15 is provided, and the second cord placing tray 16 is positioned below the unit rear surface side (upward position in FIG. 2). A clamp 22 capable of gripping the optical cord 2 suspended by the optical cord 2 is provided, and the width W and the length L of the tray main body 20 are set between the guide 21 and the clamp 22 so that the optical cord 2 has an extra length. The width and length are as wide as possible. The tray body 20 has walls 20a and 20b at both edges in the width direction. The clamp 22 may have various structures such as a structure in which the upper member 22a is raised and lowered to grip and release the bundle of optical cords 2, for example.
The guide 21 includes an inner wall 21a serving as an inner guide when the optical cord 2 is curvedly guided and an outer wall 21b serving as an outer guide, and is fixed to the tray body 20 with screws.
On the side of the unit main body 23 opposite to the second cord placement tray 16 (right side in FIGS. 1 and 2), the optical fiber 12a to be drawn into the unit main body 23 is guided with a large radius. It has a guide 25.

In the optical termination unit 11 described above, the optical cord 2 extending forward from the front surface of the unit is placed on the first cord placement tray 15 on the front side of the unit, and is routed to the side surface side of the unit to be second. The cord 22 is placed on the cord loading tray 16. The clamp 22 is positioned on the rear side of the unit with a surplus length on the second cord loading tray 16, for example, in an S-shape as shown in FIG. Is gripped by. The surplus length on the second cord placing tray 16 is estimated in advance so as to be able to cope with the amount of slack in the optical cord necessary for facilitating the optical connector attaching / detaching operation. Since the tray 16 has a sufficiently wide width W and length L, a desired surplus length can be secured.
At the time of switching the optical cord, there is an extra length of the optical cord 2 on the second cord placing tray 16, so the optical cord 2 in the state pulled to the second cord placing tray side is placed on the opposite side (see FIG. 2 can be pulled to the right (in the direction of the white arrow). Thereby, the optical cord 2 can be slackened. At this time, the front side portion 18 of the first cord loading tray 15 is unlocked by rotating the hinge portion 19 downward and rotated downward as shown in FIGS. It is effective to give slack in the front. In FIGS. 5 and 6, the slack portion on the front side of the unit of the optical cord 2 attracted is shown as being received by the front wall 18 a of the front side portion 18 of the first cord loading tray 15. Alternatively, it may be loosened freely without being received by the front wall 18a.
Thus, in a state where the optical cord 2 is slack, it is easy to run the optical cord 2 near the optical connector to be attached / detached, that is, to scrape the optical cord 2 and open the periphery of the optical connector 3 to be attached / detached. is there. Therefore, it is easy to insert an elongated connector attaching / detaching tool and grasp the optical connector 3 to be attached / detached, the workability of attaching / detaching the connector is improved, and the workability of the optical code switching work is improved.
In addition, since the optical cord 2 can be operated in a slack state, it is possible to prevent the optical fiber from being subjected to bending or tension more than allowable when the optical cord 2 is being wound.
Further, as a means for giving the optical cord 2 slackness, it is not necessary to perform a complicated operation such as releasing the clamp and giving the optical cord slackness and then holding it again with the clamp. It is.

It is a front view of the optical termination unit in the optical wiring board of one Example of this invention. It is a top view of the optical termination unit of FIG. It is a left view of the optical termination unit of FIG. It is a right view of the optical termination unit of FIG. It is a figure explaining the state of the optical cord at the time of performing optical code switching work in said optical termination unit. FIG. 6 is a right side view of FIG. 5. It is the front view which simplified and showed the optical distribution board provided with said optical termination unit in multiple steps. It is a front view of the conventional optical termination unit. It is a top view of the optical termination unit of FIG.

Explanation of symbols

2 Optical cord (optical cord with optical connector)
3 Optical connector (of optical cord with optical connector) 4 Optical connector inside unit 5 Adapter 6 Front surface of unit 11 Optical termination unit 13 Optical fiber 14 (inside unit) Fusion unit 15 First cord mounting tray 16 2 cord loading tray 17 (first code loading tray) main body side portion 18 (first code loading tray) front side portion 18a front wall 19 hinge portion 20 (second code loading tray) Tray body 20a, 20b of wall tray 21 guide 21a Inner portion 21b Outer portion 22 Clamp 23 Unit body W (of second cord loading tray) Width L (of second cord loading tray) length

Claims (2)

An optical termination unit in which a large number of optical cords with optical connectors are connected to optical fibers inside the unit by adapters arranged vertically and horizontally on the front of the unit,
A first cord placing tray on the front side of the unit on which the optical cord with the optical connector extending in front of the unit is placed, and the optical connector being routed from the first cord placing tray to the side of the unit. A second cord placing tray on the side of the unit on which the optical cord is placed, and
The second cord placing tray has a guide for guiding the optical cord with the optical connector drawn from the first cord placing tray to the unit front side position of the tray body on which the optical cord with the optical connector is placed. And a clamp that can grip an optical cord with an optical connector that is hung down from the second cord placing tray at a position on the rear side of the unit, and the width W and the length L of the tray main body are An optical termination unit characterized in that it has a width and a length that are wide enough to allow the optical cord with an optical connector to be stretched between the clamp and allow it to be stretched.   The first code loading tray is divided into a main body side portion fixed to the unit main body and a front side portion hinged so as to be rotatable downward with respect to the main body side portion when the connector is attached / detached. The optical termination unit according to claim 1.

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