JPH09222519A - Optical connection part storage tray - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the degree of freedom of the wiring position of a crossover by using at least one of insertion holes as a crossover insertion hole into which the crossover between stacked optical connection part storage tray is inserted. SOLUTION: A slit 39 through which a lead lower part pass from a tube 4a penetrates between both upper wall parts 38, and coated optical fibers 4 can be put in and out of the insertion hole 37 through the slit 39. Further, a crossover insertion hole 41 into which the crossover 40 is inserted when wired between trays 20 is formed between a curved wall 31 and a side wall 32 on the side of an engagement claw 34. Then the crossover 40 is wired between the crossover insertion hole 41 of the tray 20 and the insertion hole 37 of a tray for extension. At this time, the insertion hole 37 into which the crossover 40 is inserted functions as a crossover insertion hole. Further, the coated optical fibers 4 can be led in the extension tray through the crossover insertion hole 41.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical connection section storage tray for accommodating an optical connection section for optically connecting optical fibers and a connection extra length thereof and stacking them in a shelf shape.

[0002]

2. Description of the Related Art An optical connection section for optically connecting optical fibers and an optical connection section storage tray for storing a connection extra length thereof are applied to, for example, a connection terminal box for optical fiber cables. Hereinafter, a connection terminal box for an optical fiber cable to which a conventional optical connection portion storage tray is applied will be described with reference to FIGS. 3 (a) and 3 (b) to FIG. As shown in FIGS. 3 (a), 3 (b) and 4, the connection terminal box for an optical fiber cable is provided with optical parts by gripping metal fittings 2 installed at both axial ends of a cylindrical sleeve 1 which can be divided into two parts. While holding the fiber cable 3, the optical fiber tape cores 4 (hereinafter “tape cores”) derived from each of the pair of gripped optical fiber cables 3 are connected to each other via the optical connecting part 5, and the optical connecting part is connected. 5 and the extra connection length 6 thereof are arranged and stored in a thin plate-shaped optical connecting portion storage tray 7 (hereinafter, referred to as “tray”) in which a plurality of sheets are stacked on a connecting rod 8 that connects the holding metal fittings 2 to each other. .

As shown in FIG. 6, the trays 7 adjacent to each other are rotatably connected to each other at one side by a hinge (not shown) that rotatably supports the tray 7 along an axis parallel to the axis of the sleeve 1. . The tape core wires 4 housed in the same tray 7 are bundled and protected by a tube (not shown). As the optical connecting portion 5, a fusion splicing portion, an optical connector or the like is applied. On both sides of the tray 7, insertion holes 9 for inserting the tape core wires 4 into the tray 7 are opened one by one. A ring-shaped pressing rubber (not shown) that holds the end of the tube inside the insertion hole 9 to prevent external force such as a tensile force acting on the tape core wire 4 from affecting the optical connection portion 5 and the like inside Is attached. When performing work such as connection switching of the tape core wires 4 in the optical connector for the target tray 7, the relative rotation of the tray 7 around the hinge is used to expose the work surface of the target tray 7. When an optical coupler is used, it is stored in a dedicated coupler storage tray 11 that is stacked with the tray 7. The coupler storage tray 11 is generally placed at either end of the stack.

[0004]

By the way, in the case of the trays 7 as described above, a space for arranging the connecting wires 10 between the trays 7 is secured, and a separation portion of the tape core wires 4 housed in the trays 7 is protected, Due to the installation of the coupler storage tray 11, there is a problem that the sleeve 1 of the connection terminal box becomes large. That is, when the tape core wires 4 (hereinafter referred to as "crossover wires") are laid so as to extend between the stacked trays 7, the crossover wires 10 coming out from the insertion holes 9 on one side in the axial direction of one tray 7 are connected to each other. Since it is inserted into the insertion hole 9 on the other side in the axial direction of the tray 7,
There is a problem that the wiring length becomes long and entangled easily, and it becomes necessary to secure a wiring space for the crossovers 10 on both sides of the tray 7 in the axial direction, and the sleeve 1 becomes large.

When the tape core wires 4 are separately housed in the tray 7, each of the separated core wires is housed without tube reinforcement. However, when the tray 7 is opened and closed, tension acts on the separating portion. There is concern that it may cause a momentary interruption. For this reason, in the conventional tray 7, it is conceivable to increase the connection surplus length 6 stored in the tray 7 to prevent the tension from acting on the separating portion. The problem arises that Coupler storage tray 11
The optical coupler accommodated in the tape is fixed in advance to the target position of the coupler storage tray 11 at the factory, and is fusion-bonded to the tape core wire 4 in another tray 7 via the connecting wire 10 drawn from the coupler storage tray 11. However, there is a problem that it takes time to connect the tape core wire 4 and the optical coupler. Further, the coupler storage tray 11 is wasteful because even a small number of optical couplers to be stored are installed, the tray 7
This increases the installation space of the sleeve 1 and causes the size of the sleeve 1 to be large, and it is necessary to design the coupler storage tray 11 in accordance with the other tray 7, which also causes a cost increase.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an optical connecting portion storage tray in which the installation space is reduced and the number of cores of the optical fibers that can be accommodated is increased. To do.

[0007]

According to a first aspect of the present invention, there is provided an optical connection part storage tray, wherein in order to solve the above-mentioned problems, an optical connection part for optically connecting optical fibers and a connection extra length thereof are stored, and a tray shape is provided. A plurality of optical connection part storage trays having a plurality of insertion holes for inserting optical fibers formed therein, and at least one of the insertion holes is a stacked optical connection part storage tray. The passing wire insertion hole through which the passing wire is inserted is the means for solving the above-mentioned problems.

According to another aspect of the optical connecting part storage tray,
2. The optical connection part storage tray according to claim 1, wherein the side parts of the stacked optical connection part storage trays in the same direction are rotatably connected to each other via a hinge, and the optical connection part storage tray is connected to the hinge side. The wiring line was laid between the formed wiring line insertion hole and the wiring line insertion hole formed at a position separated from the hinge of the other optical connection part storage tray, which was a means for solving the above problems.

In the optical connecting part storage tray according to claim 3,
The optical connection part storage tray according to claim 1 or 2,
The separation part holding part made of an elastic material arranged in the optical connection part storage tray separates the multi-core optical fiber core into a plurality of separation parts, and supports the tension acting on the multi-core optical fiber core. Then, movably clamping was made the means for solving the above-mentioned problems.

In the optical connection part storage tray according to claim 4,
In the optical connection part accommodating tray according to any one of claims 1 to 3, it is a means for solving the above-mentioned problems that a coupler holding member that clamps the optical coupler and holds it detachably is provided.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an optical connection part accommodating tray of the present invention will be described below with reference to FIGS.
In the figure, the same components as those in FIGS. 3A and 3B to 6 are designated by the same reference numerals to simplify the description. Reference numeral 20 in the figure denotes an optical connection unit storage tray (hereinafter referred to as "tray") of the present embodiment. The tray 20 is shown in FIGS.
As shown in, it is formed in an elongated flat plate shape. Tray 2
At the both ends in the longitudinal direction of the bottom plate 21 of No. 0, circular extra length storage portions 22 which are slightly recessed as compared with other portions are formed. The extra length storage portion 22 is configured to store the connection extra length 6 of the tape core wire 4 while maintaining a bending radius larger than a predetermined value. At the center of the bottom plate 21, an MT connector (Mechanically) that connects the tape core wires 4 to each other in a switchable manner.
A flange-shaped connector gripping claw 24 that grips the Transferable) 23 and a separation part holding member 26 that movably holds the separation part 25 that separates the tape core wire 4 from a single core in correspondence with the tension acting on the tape core wire 4. And optical coupler 2
A flange-shaped coupler holding claw 28 (coupler holding member) for detachably holding the clamp 7 is provided. The connector grip claws 24, the separation part holding member 26, and the coupler holding claws 28 are arranged in a line so that the extending direction of the held optical connection axis or the tape core wire 4 is parallel to the longitudinal direction of the tray 20. Are arranged in. It is also possible to apply a fusion splicing part as an optical connecting part for connecting the tape core wires 4 or the single core wires 30 separated by the separating part 25. At this time, the fusion splicing portion is grasped by the grasping claws which are integrally formed with the bottom plate 21 so as to project.

The separating portion holding member 26 is made of a highly elastic material such as sponge, and the separating portion 25 is sandwiched by a slit 29 formed so as to penetrate in a direction along the longitudinal direction of the bottom plate 21. There is. The separation part holding member 26 is
It is arranged between the connector holding claw 24 and the coupler holding claw 28, and is bonded on the bottom plate 21 between the connector holding claw 24 and the coupler holding claw 28. Further, since the separating portion holding member 26 movably holds the separating portion 25 within the range of the size of the slit 29, the separating portion 25 and the single core wire 30 separated by the separating portion 25 are separated when a tension is suddenly applied. It is possible to suppress the generation of a large stress due to the movement of the portion 25, and it is possible to prevent disconnection, bending, and vibration of the tape core wire 4 and the single core wire 30. As a result, the interruption of the transmission of the optical signal in the demultiplexing unit 25 and its vicinity is prevented, and the optical transmission performance can be always maintained stable.

The coupler holding claw 28 can be attached / detached by manually elastically deforming it. Further, the pair of coupler holding claws 28 is installed on the bottom plate 21 in the tray 20 of the present embodiment, but it is also possible to install three or more.

At the edges of the extra length storage portions 22 of the bottom plate 21,
A curved wall 31 that bends along the extra length storage portion 22 is provided vertically. A side wall 32 that is linear in a plan view and has the same amount as the curved wall 31 protruding from the bottom plate 21 is formed at an edge portion of the bottom plate 21 other than the extra length storage portion 22. Coupler holding claw 28
A hinge 33 that rotatably connects the vertically stacked trays 20 is provided on the outer side of both ends in the longitudinal direction of the side wall 32 on the side close to the. The pair of trays 20 connected by the hinge 33 is configured such that the upper tray 20 is superposed on the lower tray 20 so that the opening of the lower tray 20 is closed. Engagement claws 3 that manually connect the trays 20 that are stacked one above the other so that they can be engaged and disengaged manually at both ends in the longitudinal direction of the side wall 32 that faces the hinges 33.
4 and a locking recess 35 for locking the engaging claw 34 are formed. Further, on the inner surface sides of the curved wall 31 and the side wall 32, the tape core wire 4 and the single core wire 3 laid on the bottom plate 21 are arranged.
Claws 36 that house 0 between the bottom plate 21 and the bottom plate 21 are provided at a plurality of locations.

At the boundary between the curved wall 31 and the side wall 32 on the hinge 33 side, an insertion hole 37 for inserting the tape core wire 4 into the tray 20 is opened. The insertion hole 37 is
This is a part in which the curved wall 31 and the side wall 32 are formed in parallel with each other through a clearance through which the tube 4a covering portion of the tape core wire 4 can be inserted, and the curved wall 31, the side wall 32, and the curved wall 31 and the side wall 32. With the upper wall portion 38 and the bottom plate 21 protruding from each toward the other side, the tape core wire 4
Is almost surrounded. A slit 39 through which the portion of the tape core wire 4 protruding from the tube 4a can pass is inserted between both upper wall portions 38 along the axial direction of the insertion hole 37, and the inside and outside of the insertion hole 37 are inserted through the slit 39. The tape core wire 4 can be taken in and out. In addition, the tube 4a inserted into the insertion hole 37 is
It is clamped between the bottom plate 21 and the claw 36 protruding from the side wall 32 in the vicinity of, so that it cannot be easily pulled out. The exposed end of the tube 4a is the tube 4
It is arranged in the vicinity of the claw 36 for fixing a.

Between the curved wall 31 and the side wall 32 on the side of the engaging claw 34, there is formed a wire passing hole 41 through which the wire 40 is inserted when the wire 40 is laid between the trays 20. ing. The crossover wire 40 is a tape core wire reinforced with a tube 42. The crossover insertion hole 41 is a portion in which the curved wall 31 and the side wall 32 are formed in parallel with each other through a clearance through which the crossover 40 can be inserted. A clamp wall 43 is provided at an intermediate portion between the curved wall 31 and the side wall 32 which face each other. The clamp wall 43 is a protrusion provided on the bottom plate 21. A plurality of bulging portions 44 are formed on the clamp wall 43, and the tube 42 of the connecting wire 40 inserted between the clamp wall 43 and the curved wall 31 or between the clamp wall 43 and the engaging claw 34 is
A plurality of portions are slightly bent by the protrusion 45 formed on the surface of the curved wall 31 facing the clamp wall 43 and the bulging portion 44 of the front clamp wall 43 to be housed.
As a result, the tube 42 inserted into the wire insertion hole 41 is
The movement in the axial direction is restricted, and the proof stress against tensile force is improved. Therefore, it is possible to omit the installation of the pressing rubber in the crossover insertion hole 41. The tube 4 a of the tape core wire 4 can be inserted into the connecting wire insertion hole 41.

A wiring line 40 laid between a set of trays 20.
An extra drawing length 46 corresponding to the relative rotation of the trays 20 about the hinges 33 is secured at one end of the. The extra drawing length 46 is accommodated in the extra length accommodating portion 22 of the tray 20 in which the connecting wire 40 is inserted through the insertion hole 37, so that the bending radius is always maintained above the specified radius. The entire tray 20 is integrally formed of resin or the like.

The operation and effect of the tray 20 will be described below. The tray 20 includes an optical coupler 27 interposed in the middle of the tape core wire 4 inserted from both insertion holes 37,
Since the separating portion 25 and the MT connector 23 are collectively arranged and housed in the central portion of the tray 20 such that the extending directions of the optical connection axis line and the tape core wire 4 are parallel to each other, they are housed in one tray 20. A large number of optical components and the separating unit 25 can be organized and stored compactly, and the number of storage cores increases. As a result, the number of stacked trays 20 can be reduced. Further, since the optical coupler 27 can be housed together with the MT connector 23, a dedicated tray for housing the optical coupler 27 becomes unnecessary, and the space for installing the tray 20 can be saved.

Further, the separating portion 25 is attached to the separating portion holding member 26.
Since it is held stably just by clamping it to the separation part 25
Can be easily stored, and since it is not necessary to attach a branching device to the separating portion 25 or to perform fusion bonding reinforcement,
The cost can be reduced and the storage space can be reduced.

When the tray 20a for expansion is installed side by side with one tray 20, the optical coupler 2 is initially provided only in the tray 20.
7, the separating portion 25, and the MT connector 23 are stored, and the connecting wire 40 separated in the tray 20 is used as the extension tray 20a.
And the trailing line 40 in the extension tray 20a later.
The two are separated and connected via an optical connector or a fusion splicing part. By doing so, it is possible to perform the line extension work without touching the optical fiber in the tray 20, so that it is possible to efficiently perform the work without causing a momentary interruption of communication during the work.

As shown in FIG. 2, the crossover 40 is connected to the tray 2
0 through wire insertion hole 41 and extension tray 20a insertion hole 37
Wire between and. At this time, the insertion hole 37 through which the connecting wire 40 is inserted functions as a connecting wire insertion hole. It is also possible to introduce the tape core wire 4 into the extension tray 20a via the wire passing hole 41. The transfer line 40 is the tray 2
Since the wire is laid along the outer surface of the curved wall 31 of 0, it is possible to always maintain a curved radius larger than the specified value. Further, since the crossover wire 40 is wired from the crossover wire insertion hole 41 of the tray 20 along the curved wall 31 and introduced into the insertion hole 37 of the additional tray 20a, compared to the conventional wiring line path of the crossover wire. Thus, the wiring length can be significantly reduced, and the entanglement and vibration of the connecting wires 40 due to the slack of the connecting wires 40 and the like can be prevented.

The radius of curvature of the connecting wire 40 is maintained above the specified value even when the trays 20 and 20a forming the set are relatively rotated about the hinge 33. When the trays 20 are separated from each other, the extra drawing length 46 of the connecting wire 40 is pulled out from the inside of the additional tray 20 a through the insertion hole 37. This time,
The end of the connecting wire 40 inserted into the connecting wire insertion hole 41 of the tray 20a is held by the clamping force of the connecting wire insertion hole 41. When the trays 20 constituting the set are rotated in a direction of approaching each other, the extra drawing length 46 of the connecting wire 40 is set in the insertion hole 3
It is manually pushed into the extension tray 20a via 7.

Therefore, according to the tray 20 of the present embodiment, the optical parts such as the optical coupler 27 and the MT connector 23 and the separating portion 25 of the tape core wire 4 can be efficiently stored, and a storage tray dedicated to the optical coupler 27 can be provided. Since it can be omitted, the installation space of the tray 20 can be significantly saved. Further, since the wiring length between the trays 20 is laid by using the wiring insertion holes 41, the laying length is shortened, so that the wiring space of the wiring 40 can be greatly reduced and the wiring can be greatly reduced. Since the entangled vibration of the wire 40 is prevented, the optical transmission performance of the crossover wire 40 can be always maintained stable. Further, since the degree of freedom of the wiring positions of the tape core wires 4 and the crossover wires 40 is improved, it is possible to cope with a complicated connection between the tape core wires 4 and the versatility is improved.

The formation positions and the numbers of the insertion holes and the crossover insertion holes are not limited to those described in the above embodiment.

[0025]

As described above, according to the optical connection part storage tray of the first aspect, the optical connection parts for optically connecting the optical fibers and the extra connection lengths thereof are stored, and a plurality of shelves are stacked. And a plurality of insertion holes for inserting optical fibers therein, at least one of these insertion holes is provided between the stacked optical connection unit storage trays. Since it was a passage insertion hole through which the wire is inserted,
The degree of freedom in the wiring position of the crossovers is improved, and it is possible to deal with the case where the connection between the optical fibers is complicated, which is an excellent effect that the versatility is improved.

In the optical connecting part storage tray according to claim 2,
2. The optical connection part storage tray according to claim 1, wherein the side parts of the stacked optical connection part storage trays in the same direction are rotatably connected to each other via a hinge, and the optical connection part storage tray is connected to the hinge side. By laying the crossover wire between the formed crossover wire insertion hole and the crossover wire insertion hole formed at a position separated from the hinge of the other optical connection part storage tray, the laying length of the crossover wire is shortened, so The wiring space of the wire can be greatly reduced, and the entanglement and vibration of the wire can be prevented,
It has an excellent effect that the optical transmission performance of the crossover can be always maintained stable.

In the optical connecting part storage tray according to claim 3,
The optical connection part storage tray according to claim 1 or 2,
The separation part holding part made of an elastic material arranged in the optical connection part storage tray separates the multi-core optical fiber core into a plurality of separation parts, and supports the tension acting on the multi-core optical fiber core. By clamping so that it can move,
Since the separating part can be easily stored without additional reinforcement, the separating part can be stored in a small storage space and the cost can be reduced.

In the optical connecting part accommodating tray according to claim 4,
The optical connection part accommodating tray according to any one of claims 1 to 3, wherein a tray for exclusive use of accommodating the optical coupler is omitted, since a coupler holding member that clamps and detachably holds the optical coupler is provided inside. Therefore, there is an excellent effect that the installation space of the optical connection part storage tray can be saved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an optical connection part storage tray of the present invention.

FIG. 2 is a perspective view showing the operation of the embodiment of the optical connection part storage tray of the present invention.

3A and 3B are views showing a connection terminal box, in which FIG. 3A is a side view and FIG. 3B is a front sectional view.

4 is a schematic plan view showing the connection terminal box of FIG. 3. FIG.

FIG. 5 is a perspective view showing a conventional optical connection part storage tray.

FIG. 6 is a perspective view showing an operation of a conventional optical connection part storage tray.

[Explanation of symbols]

4 ... Optical fiber (optical fiber tape core wire), 6 ... Extra connection length, 20 ... Optical connection part storage tray (tray), 20a ... Optical connection part storage tray (extension tray), 23 ... Optical connection part (MT connector) ), 25 ... Separation part, 26 ... Separation part holding member, 27 ... Optical coupler, 28 ... Coupler holding member (coupler holding claw), 33 ... Hinge, 37 ... Insertion hole, 40 ... Crossover wire, 4
1 ... Crossover insertion hole.

Claims (4)

[Claims] 1. An optical connection part accommodating tray (20, 20) for accommodating an optical connection part (23) for optically connecting optical fibers (4) to each other and a connection extra length (6) thereof and stacking a plurality of shelves in a shelf shape.
a), in which the insertion hole (37) for inserting the optical fiber is 2
Formed above, at least one of these insertion holes,
An optical connection part accommodating tray, characterized in that the optical connection part accommodating tray has a connecting wire insertion hole (41) through which a connecting wire (40) between stacked optical connection part accommodating trays is inserted. 2. The optical connection part accommodating tray according to claim 1, wherein the side parts in the same direction of the stacked optical connection part accommodating trays are rotatably connected to each other via a hinge (33), and one optical part is connected. It is characterized in that a connecting wire is laid between the connecting wire insertion hole formed on the hinge side of the connection part storage tray and the connecting wire insertion hole formed at a position separated from the hinge of the other optical connection part storage tray. Optical connection part storage tray. 3. The optical connecting part accommodating tray according to claim 1 or 2, wherein the separating part holding part (26) made of an elastic material is disposed in the optical connecting part accommodating tray.
An optical connecting part storage characterized in that a separation part (25) in which a multi-core optical fiber core wire (4) is separated into a plurality of parts is movably clamped in accordance with a tension acting on the multi-core optical fiber core wire. tray. 4. The optical connection part storage tray according to claim 1, further comprising a coupler holding member (28) for holding the optical coupler (27) by detaching it. Characteristic optical connection unit storage tray.