JP2003107251A - Optical termination box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical termination box which has good space efficiency and facilitates terminating and connecting operation. SOLUTION: The optical termination box is for terminating a ribbon of coated optical fibers in an optical cable introduced from outside into a single- core optical connector and internally has a tray unit 2 comprising a connector storage tray 7 which stores an optical connector, a connection part storage tray 6 which is stacked and arranged on the connector storage tray 7 and stores a part for connection with the coated optical fibers in the optical cable, a branch coated optical fiber which is a coated optical fiber having one end connected to a coated optical fiber in the optical cable and the other end branched and terminated into an optical connector and fitted from the connection part storage tray 6 to the connector storage tray 7, and a unit case 8 which can store the connector storage tray 7 and connection part storage tray 6 so that they can be pulled out in a stacked state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical termination box for branching a plurality of tape-shaped optical fiber core wires inside an optical cable and terminating each into an optical connector.

[0002]

2. Description of the Related Art When introducing an external optical cable into a building such as a building from the outdoors or from the ground, an optical termination box is installed in the equipment room in the building, and a connection part with an indoor optical fiber is installed inside the box. And the extra length of the optical fiber is stored. The optical termination box is a system in which a plurality of tape-shaped optical fiber core wires in an optical cable are finally used as a single-core (or multi-core) optical connector, and the connectivity to the optical fiber in the optical cable is provided. Installed to improve. By using the optical termination box, the end of the multi-core optical fiber core wire in the optical cable is finally terminated as an optical connector. Since it is very difficult to branch a multi-core optical fiber into a single fiber in the field, a “Fan Out code (hereinafter, referred to as F
The multi-core optical fiber is made into a single core by using the "O code") and stored in the optical termination box. The FO code is shown in FIG.

The FO cord 104 has a tape-shaped optical fiber core wire 104a (here, four cores) at one end, and is branched to a single-core cord portion 104d at a branch portion 104c via a covering portion 104b. ing. FO code 104
An optical connector 104e is attached to the other end (that is, the end of the single-core cord portion 104d) to be a connector (= terminated). By using this FO code 104, a multi-core tape-shaped optical fiber core wire 104a
Can be singly branched.

The FO cord, the extra length of the optical fiber core on the optical cable side, and the extra length of the optical fiber cord connected to the optical connector of the FO cord are housed in the optical termination box. FIG. 28 shows the inside of a conventional termination box. The end portion of the outside optical cable 101 is the grip portion 10 in the optical termination box.
Fixed to 2. Further, in the optical termination box, a plurality of fusion-bonding part storage trays 103 for accommodating the above-mentioned fusion-bonding part and an extra length portion in the vicinity thereof are stacked and held. In addition, the FO cord 10 is provided above the fusion unit storage tray 103.
Multiple connector storage trays 1 for storing 4 connector ends
05 is stacked and held. An indoor optical fiber cord 106 is connector-connected to the connector end of the FO cord 104. With the recent increase in capacity of external optical cables (up to 1000 cores), the outer diameter of the optical cables increases, the number of trays 103 and 105 described above also increases, and the optical termination box tends to increase in size.

[0005]

However, in the above-mentioned conventional termination box, the usability is poor in the following points, and an improvement has been demanded. With the increase in capacity in recent years, the number of FO cords stored in the photo-termination box has dramatically increased, and the number of FO cords has reached 100 to tens to several hundreds when the number of cores reaches 1,000. Multiple optical cables may be connected to one optical termination box, and in this case, more than 2000 optical fibers will be processed by one optical termination box. In such a case, the bundle of FO cords has a diameter of several tens of cm, which makes it difficult to handle and store them. Further, in the case of the photo-termination box as shown in FIG. 28, the number of the two trays 103 and 105 occupies a large space to occupy a space, so that the internal space becomes strict and it becomes difficult to perform various operations.

The termination work using the FO code is usually required only when the optical termination box is installed. Once the optical termination box is installed, the FO code itself is rarely moved, and the transmission path is switched by reconnecting the indoor optical fiber code. For this reason, it is necessary to secure sufficient space by focusing on the workability of switching the optical fiber cord on the indoor side to the optical connector inside the optical termination box. Also, as described above, F
It is also necessary to consider the workability of storing the O-code, and work space (and extra length storage space) on both the outside line side and indoor side
is necessary. However, it is difficult to secure these spaces sufficiently due to the increase in the number of core wires described above.

In order to improve the space efficiency, the above-mentioned two trays are combined into one, and a drawer type is also put into practical use. However, the size of one tray must be increased, and there must be sufficient space for its drawer. There is no problem if there is enough space around the termination box, but if there is not enough space, it will overhang when the tray is pulled out, so it may not contribute much to workability improvement.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an optical termination box which is space efficient and which can be easily terminated and connected.

[0009]

The optical termination box of the present invention terminates a plurality of tape-shaped optical fiber core wires in an optical cable introduced from the outside into a single-core optical connector. A connector storage tray for storing the optical connector, a connection portion storage tray that is stacked and arranged on the connector storage tray and stores a connection portion with the optical fiber core wire in the optical cable, and an optical fiber core wire in the optical cable at one end. The other end of the optical fiber core wire to be connected is terminated as an optical connector by branching the optical fiber core wire, and the branched optical fiber core wire attached from the connection part storage tray to the connector storage tray, the connector storage tray, and It is characterized in that a tray unit including a unit case for accommodating the connection portion storage trays in a stackable state so as to be drawn out is provided inside.

According to the present invention, a connection portion storage tray for storing a connection portion (a connection portion using fusion splicing, mechanical splicing, etc.) with an optical fiber core wire in an optical cable and an optical connector after termination are stored. And the connector storage tray to be stacked are arranged as a tray unit. Then, the stacked connection portion storage tray and the connector storage tray are connected by a branch optical fiber core wire (not by the FO code) to achieve high integration and high density. conventionally,
Space efficiency was poor because a FO code requiring a protective coating was used, but in the present invention, this portion is used as an optical fiber core wire to improve space efficiency. In addition, since the connecting portion and the optical connector are respectively located on the two stacked trays and are close to each other, the length of the branch optical fiber core connecting these portions is shortened, which also contributes to the improvement of space efficiency.

Further, since it is divided into two parts, that is, the connection part storage tray and the connector storage tray, the space required when pulling out each tray can be minimized, and the work at the time of the optical fiber core wire connection work and the connector connection work. A sufficient space can be secured and workability can be improved. Further, since these two trays are housed in the unit case to form the tray unit, it is possible to easily cope with a change in the number of stored cores by simply increasing or decreasing this tray unit. This can be achieved by accommodating the connector accommodating tray and the connector accommodating tray accommodating the connector corresponding to the optical connector on the connector accommodating tray in one tray unit.

Here, in the connector storage tray, a plurality of optical connectors are arranged in the pull-out direction when they are stored in the unit case, and after being pulled out from the unit case, they are rotated by approximately 90 degrees to pull the plurality of optical connectors in the pull-out direction. It is preferable to have a rotating mechanism for arranging them in a direction substantially perpendicular to them.

With this configuration, when the connector storage tray is stored, the length in the depth direction (drawing direction of the tray) can be utilized to keep the frontage small and to store the connector storage tray at a high density. At the same time, at the time of pulling out (when the optical connector is connected or when the connection is switched), the connector storage tray can be rotated by the rotating mechanism to arrange the optical connectors in the front direction to facilitate the work. Further, with such a structure, the space occupied by the pulled-out tray can be minimized, and a sufficient working space can be secured.

Further, here, it is preferable that the tray unit has a stopper mechanism for maintaining the state of the connector accommodating tray rotated by about 90 degrees after being pulled out. By doing so, the state of the rotated tray unit can be reliably held, and the connection work and the like can be facilitated. Further, it is possible to reliably prevent the connector storage tray from rotating against the operator's intention and damaging the optical fiber or the like.

Further, it is preferable that the tray units are provided inside in a state of being arranged in a matrix in a plane perpendicular to the drawing direction. By doing so, the tray unit can be installed in the termination box efficiently and efficiently.
It can be stored in a state where it is easy to perform various operations. By arranging the tray units in a matrix, densification can be performed very efficiently. Further, the tray unit in the photo-termination box of the present invention is constructed as a form suitable for such storage, and can be easily stored in a matrix. Further, the worker can easily perform various works by facing the above-mentioned plane and pulling out the target tray of the target unit.

Further, the connection portion storage tray stores a connection portion holding portion for storing a connection portion between the optical fiber core wire and the branch optical fiber core wire in the optical cable and an extra length storage for storing an extra length portion near the connection portion. And an S-shaped portion storage portion for storing a part of the branched optical fiber core wire in an S-shape when stored in the unit case on the rear side of the drawer. preferable.

By doing so, since the connecting portion holding portion and the extra length storing portion are provided on the front side of the drawn-out connecting portion storing tray, the connecting portion connecting operation and the extra length storing operation can be performed. Easy to do. Further, it has an S-shaped portion storage portion on the inner side of the drawer, and a part of the branched optical fiber is inside the S-shaped portion.
By storing in a letter shape, the S-shaped part of the branched optical fiber core is extended when the connection part storage tray is pulled out so that the connection part storage tray can be pulled out smoothly, while preventing damage to the optical fiber. can do.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an optical termination box of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a plurality of tray units 2 are mounted in a matrix inside the termination box 1 of the present embodiment. In this embodiment, 36 units are arranged in the vertical direction and 2 units are arranged in the horizontal direction. As will be described later, since 40 optical fibers can be processed by one tray unit, the optical termination box 1 can connect optical fibers of less than 3000 fibers. On the inner side of the optical termination box 1, there is provided a cable fixing portion 4 for fixing the tip of the external optical cable 3 introduced from below.

The indoor optical fiber cord 5 introduced into the interior of the termination box 1 is introduced into the interior of the termination box 1 from above (or from the top of the termination box 1). Derived). It should be noted that FIG. 1 does not show the door attached to the front surface of the termination box 1, but shows a state in which the door is viewed from the front. Further, FIG. 1 shows only some of the optical fibers led from the optical cable 3. Similarly, only one indoor optical fiber cord 5 is shown.

Next, the above-mentioned tray unit 2 will be described in detail. 2 is a plan view of the tray unit 2, FIG. 3 is a front view, and FIG. 4 is a right side view. Tray unit 2
Mainly consists of five parts, namely, the connection part storage tray 6,
It comprises a connector storage tray 7, a unit case 8, a tray holding plate 9, and a branched optical fiber core wire 10.

The connecting portion storage tray 6 is a unit case 8
It is stored in the lower row so that it can be pulled out. The connector storage tray 7 is slidably and rotatably attached to the tray holding plate 9, and the tray holding plate 9 is fixed to the upper stage of the unit case 8. As a result, the connector storage tray 7 can be pulled out from the unit case 8. The branched optical fiber core wire 10 is an optical connector in which one end is a tape-shaped optical fiber core wire forming a connection portion and the other end is branched into a single-core optical fiber to form a connector.

At the rear of the side surface of the unit case 8, there is formed a flange portion 11 projecting laterally, and a bolt insertion hole 12 for fixing is formed in this flange portion 11. Each tray unit 2 is fixed inside the termination box 1 using the bolt insertion hole 12. Further, inside the unit case 8, there is a partition plate 13 that divides the upper stage and the lower stage. Further, a stopper (stopper mechanism) 14 is attached to the left side on the front end side of the unit case 8.

The connecting portion storage tray 6 will be described. FIG. 5 shows a plan view of the connection part storage tray 6. The connection portion storage tray 6 has a rectangular shape and is stored in the unit case 8 so as to be pulled out to the front side in the drawing. The front end portion of the unit case 8 when the connection portion storage tray 6 is stored in the unit case 8 is the portion A in FIG. 5, and the front end portion of the unit case 8 when it is pulled out is the portion B in FIG. . After the connection part storage tray 6 is stored in the lower part of the unit case 8, the screw 15 is attached from the side of the unit case 8 so that the tip of the screw 15 and the rear end part 16 of the connection part storage tray 6 come into contact with each other. Therefore, the connection part storage tray 6 is prevented from falling off from the unit case 8.

At the front end edge of the connection part storage tray 6, a knob 29 used when pulling out the connection part storage tray 6 is formed. In addition, on the front side of the connection part storage tray 6, a connection part 18 between the tape-shaped optical fiber core wire side end of the branched optical fiber core wire 10 and the tape-shaped optical fiber core wire 17 taken out from the external optical cable 3 is provided. A connection part holding part 19 for accommodating is formed. An extra length storage portion 20 is formed adjacent to the connection portion holding portion 19. The extra length storage portion 20 includes an elliptical wall portion 21 standing upright from the bottom surface of the connection portion storage tray 6, and a plurality of holding arm portions 22 extending horizontally from the upper end of the wall portion 21.

The wall portion 21 has a surplus length portion so that the surplus length portion maintains a bending radius that does not worsen the transmission loss, and that the surplus length portion is wound and is efficiently stored. It guides on the outside. Further, in the case of the present embodiment, the extra length storage portion 20 stores the end portion of the branch optical fiber core wire 10 that is not used inside the wall portion 21. The holding arm portion 22 holds the wound optical fiber core wires 10 and 11 held outside or inside the wall portion 21 from above. In addition, a hole is formed in the lower portion of the holding arm portion 22 on the bottom surface of the connection portion storage tray 6 to facilitate resin molding by the mold of the connection portion storage tray 6.

The tape-shaped optical fiber core wire 17 taken out from the external optical cable 3 is introduced from the introduction portion 23 formed on the left side of the extra length storage portion 20. A lead-out portion 24 similar to the lead-in portion 23 is formed on the right side of the front end portion of the connection portion storage tray 6. From the lead-out portion 24, a tape-shaped optical fiber core wire that is not connected to the connector storage tray 7 side described later and is connected to another optical cable or the like is led out. For example, a tape-shaped optical fiber core wire in a certain optical cable and a tape-shaped optical fiber core wire in another optical cable are connected, and the connection portion and the extra length portion are connected portion storage tray 6
May be stored inside. At this time, the pair of optical fiber core wires are introduced and led out onto the connection part storage tray 6 by using the introducing part 23 and the extracting part 24.

On the inner side of the drawer of the connection part storage tray 6,
A plurality of branched optical fiber core wires 10 are connected to a spiral tube 2
An S-shaped portion storage portion 26 is formed which is bundled with 5 or the like to be stored in an S-shape. A guide 27 is erected from the bottom surface of the S-shaped portion storage portion 26. The guide 27 prevents the radius of curvature of the branched optical fiber core wire 10 from becoming too small. The S-shaped portion storage portion 26 includes an extra length storage portion 20.
A holding portion 28 that holds the branched optical fiber core wire 10 is also formed. What is indicated by a dashed line in FIG.
It is the position of the branched optical fiber core wire 10 when the connection portion storage tray 6 is pulled out. In this way, the connection part storage tray 6
By storing the branched optical fiber core wire 10 in an S-shape when storing, the S-shaped portion is extended when the connection part storage tray 6 is pulled out, and extra tension is applied to the branched optical fiber core wire 10. Are prevented.

Next, the connector storage tray 7 will be described. The connector storage tray 7 has a two-layer structure including a lower tray 7a and an upper tray 7b. FIG. 6 shows a plan view of the lower tray 7a. FIG. 7 shows a bottom view of the lower tray 7a. FIG. 8 shows a plan view of the connector storage tray 7 (a state in which the lower tray 7a and the upper tray 7b are integrated). The connector storage tray 7 has a rectangular shape and is stored in the unit case 8 together with the tray holding plate 9 shown in FIG. Only the tray holding plate 9 is fixed to the unit case 8 by mounting the connector storage tray 7 and the tray holding plate 9 in the upper stage of the unit case 8 and then attaching a screw 15 from the side of the unit case 8.

As shown in FIG. 6, on the rear side of the drawer of the lower tray 7a, the above-mentioned lower connecting portion storage tray 6 is provided.
It has a holding portion 30 for holding the branched optical fiber core wire 10 from. The extra length storage section 3 is provided adjacent to the holding section 30.
1 is formed. The extra length storage 31 is provided in the lower tray 7.
a circular wall portion 32 provided upright from the bottom surface of a and the wall portion 3
2 and a plurality of holding arm portions 33 extending horizontally from the upper end. The wall portion 32 surrounds the extra length portion so that the extra length portion maintains a bending radius that does not worsen the transmission loss and that the extra length portion is wound and is efficiently stored. I'm guiding. The holding arm portion 33 holds the optical fiber core wire 10 in a wound state held around the wall portion 32.
Is held from above. The lower tray 7a
A hole is formed in a lower portion of the holding arm portion 33 on the bottom surface of the lower tray 7 to facilitate resin molding by the mold of the lower tray 7a.

A claw 34 for attaching an upper tray 7b, which will be described later, is formed at the center of the extra length storage portion 31. A hole is also formed in the root portion of the claw 34, which facilitates resin molding by the mold of the lower tray 7a. On the front side of the extra length storage portion on the lower tray 7a, five connector adapters 35 are arranged along the pulling direction of the connector storage tray 7. One connector adapter 3
In total, eight connectors can be connected to the upper and lower two stages.
An optical connector 36 of the branched optical fiber core wire 10 extending from the extra length storage portion 31 is connected to one side of the connector adapter 35 (on the right side in FIG. 6 in the present embodiment). The optical connector 36 is a single-core connector.

Branch optical fiber core wire 10 of the lower tray 7a
A plurality of holding arm portions 37 are horizontally extended from the inner side surface on the side where is extended. The holding arm portion 37 holds the branched optical fiber core wire 10 from above. A hole is also formed in the lower portion of the holding arm portion 37 on the bottom surface of the lower tray 7a, which facilitates resin molding by the mold of the lower tray 7a. The bottom portion 38 of the lower tray 7a on the side of the connector adapter 35 to which the optical connector 36 is not connected is rotatable downward. Rotating the bottom portion 38 downward facilitates connection of the indoor optical connector 39 (see FIG. 8) to the connector adapter 35.

A plurality of label holding portions 40 are formed around the bottom portion 38, and the label holding portions 40 can hold a card type label. Entry field for each optical connector 36 on the label (fill in the connection destination etc.)
Those provided with are used. Lower tray 7
A knob 41 used when pulling out the connector storage tray 7 and a claw 42 for mounting an upper tray 7b, which will be described later, are formed on the front edge of a.

Further, as shown in FIG. 7, a rotating shaft 43 is formed on the lower surface of the lower tray 7a. The rotating shaft 43 slightly projects from the bottom surface of the lower tray 7a. From the lower end of the rotary shaft 43, a retaining collar 44 is horizontally extended laterally. Connector storage tray 7
The (lower tray 7a) can be slid and rotated with respect to the tray holding plate 9 (unit case 8) by fitting the rotating shaft 43 into the guide hole 45 of the tray holding plate 9 shown in FIG.

As shown in FIG. 8, the upper tray 7b
Has a substantially L-shape attached to cover the upper part of the branched optical fiber core on the lower tray 7a. The upper tray 7b is provided with an optical fiber cord 46 on the indoor side.
U-shaped (mirror image J-shaped) cord storage section 4 for storing
Have 7. In addition, on the upper part of the cord storage portion 47,
A protective sheet 48 for protecting the optical fiber cord 46 inside the cord housing 47 is also attached. A plurality of holding arm portions 49 are horizontally extended from the upper edge of the cord storage portion 47. The holding arm 49 holds the optical fiber cord 46 in the cord housing 47 from above.

By connecting the optical connector 39 to the connector adapter 35, the optical fiber core wire 17 in the optical cable 3 on the external line side and the optical fiber cord 39 on the indoor side are optically connected via the branch optical fiber core wire 10. It Cord storage 4
No side wall portion is formed on the front side of 7, and the optical fiber cord 46 is led out from this portion. The upper tray 7b has holes 50 and 51 at positions corresponding to the claws 34 and 42 of the lower tray 7a, respectively. Place the upper tray 7b on the lower tray 7a, and insert the holes 5 in the claws 34 and 42.
By fitting 0 and 51 respectively, the upper tray 7b and the lower tray 7a are integrated.

As shown in FIG. 9, the tray holding plate 9
Has an elongated guide hole 45 at the center thereof. As described above, the guide hole 45 allows the connector storage tray 7 to slide and rotate. FIGS. 10 to 13 show this state from below. Figure 1
In FIGS. 0 to 13, the rotary shaft 43 and the bottom surface of the retaining collar 44 are hatched for clarity. Further, a step 52 having substantially the same thickness as the retaining collar 44 is formed on the bottom surface side of the tray holding plate 9 so that the rotary shaft 43 can be smoothly moved and rotated in the guide hole 45. ing.

The state shown in FIG. 10 corresponds to the state of being housed in the unit case 8. In this state,
Since the retaining collar 44 and the opening edge of the guide hole 45 do not overlap, the connector storage tray 7 is attached to the tray holding plate 9
Can get out of. However, if the connector holding tray 7 and the tray holding plate 9 are housed in the unit case 8 and the tray holding plate 9 and the unit case 8 are fixed, the connector holding tray 7 is removed because it is inside the unit case 8. There is no such thing.

FIG. 11 shows a state in which the connector storage tray 7 is fully pulled out from this state. At this time, the rotary shaft 43 slides inside the guide hole 45. Since the retaining collar 44 and the opening edge of the guide hole 45 overlap each other, the connector storage tray 7 does not come off. FIGS. 12 and 13 show a state in which the connector storage tray 7 is fully pulled out and then the connector storage tray is further rotated. The rotating shaft 43 is formed by combining cylinders having different diameters, and the front end portion of the guide hole 45 is also formed in a corresponding shape. Therefore, the connector storage tray 7 cannot be rotated in the opposite direction. Further, since the retaining collar 44 always overlaps the opening edge of the guide hole 45 during rotation, the connector storage tray 7 does not come off during rotation.

A method of using the above tray unit 2 will be described with reference to FIGS. 14 to 26. Of the tray units 2 arranged in a matrix in the optical termination box 1 as shown in FIG. 1, a tape-shaped optical fiber core wire 1 in an optical cable 3 is provided.
Connecting unit storage tray 6 of the tray unit 2 for connecting 7
Is pulled out to the front as shown in FIG. Note that the drawing of the connector storage tray 7 is omitted in FIG. 14. Further, the connecting portion storage tray 6 shown in FIG. 14 is different from that shown in FIG. 5 in the number of holding arms 22. Although not shown, a protective sheet such as the protective sheet 48 of the connector storage tray 7 is also provided on the connection portion storage tray 6 and is removed.

Since the end of the branched optical fiber core 10 on the tape-shaped optical fiber core side is housed on the connection part storage tray 6, it is connected to the optical fiber core 17 in the optical cable 3 (this embodiment). In the form, fusion splicing). After that, the connecting portion 18 (see FIG. 5) is fixed to the connecting portion holding portion 19, and the extra length portion near the connecting portion 18 is stored in the extra length storing portion 20. After that, the protective sheet is returned and the connection portion storage tray 6 is returned into the unit case 8. As described above, since only the small connection portion storage tray 6 is pulled out at the time of this work, a large space is not required and a wide work space can be secured to facilitate the work. Further, at this time, no unreasonable force is applied to the branched optical fiber core wire 10.

The branched optical fiber core wire 10 is stored in the tray unit 2 in advance in a space-efficient manner as a core wire instead of a cord. As a result, it contributes to downsizing of the tray unit 2, and the tray unit 2 is attached to the optical termination box 1.
It can be stored in space efficiently. Next, the connection of the optical connector 39 of the indoor optical fiber cord 46 to the tray unit 2 will be described. First, Fig. 1
5 and 16, the connector storage tray 7 of the target tray unit 2 is pulled out. Note that FIG.
FIGS. 17, 21 to 24, and 26 show a state in which the bottom portion 38 of the connector storage tray 7 is removed.

In the tray unit 2, the connector adapter 35, that is, the branched optical fiber core wire 1 connected to the connector adapter 35.
Since the 0 optical connectors 36 are arranged in the pull-out direction, the optical connectors 36 can be housed at a high density by utilizing the depth direction of the tray unit 2 (optical termination box 1).
Further, since the width of the tray units can be suppressed, more tray units 2 can be arranged at high density when the tray units 2 are arranged in a matrix inside the termination box 1. However, if this is left as it is, the connecting surface for connecting the optical connector 39 at the end of the indoor optical fiber cord 46 faces the side, and it is difficult to perform the connecting work.

Therefore, as shown in FIG. 17, the connector storage tray 7 is rotated by approximately 90 degrees so that the connection surface faces the operator. At this time, even if the frontage of the tray unit 2 is narrow, the horizontal space can be effectively used by rotating the connector storage tray 7, and a working space can be secured. Further, since the amount of protrusion in the pull-out direction is reduced, a sufficient working space can be secured from this point as well. Rotated connector storage tray 7
Is maintained at the position after rotation by the stopper 14.
The operation of the stopper 14 is shown in FIGS.

The stopper 14 is attached to the front end side of the unit case 8 as described above. Stopper 14
Is a small piece that hangs downward by its own weight. This small piece is attached to the upper surface of the unit case 8 via a hinge. A knob is formed on this small piece. When the connector storage tray 7 is stored inside the tray unit 2, as shown in FIG. 18, the connector storage tray 7 hangs down substantially vertically by its own weight. When the connector storage tray 7 is pulled out and rotated, as shown in FIG. 19, the stopper 14 is pushed upward by being pushed by the rotating connector storage tray 7. Then, when the connector storage tray 7 rotates by approximately 90 degrees, as shown in FIG. 20, the connector storage tray 7 again hangs down by its own weight in the substantially vertical direction. As a result,
Reverse rotation of the connector storage tray 7 is restricted by the stopper 14, and the connector storage tray 7 maintains a position rotated by approximately 90 degrees.

Next, as shown in FIG. 21, the protective sheet 48 is once removed, and as shown in FIGS. 22 and 23, the optical connector 39 of the optical fiber cord 46 on the indoor side is connected using a connector attaching / detaching tool. The optical fiber cord 46 is stored in the cord storage portion 47 of the connector storage tray 7 while ensuring the extra length. All fiber optic cords 4
When 6 is connected, the protective sheet 48 is attached again as shown in FIG. Then, as shown in FIG. 25, while lifting the stopper 14 using the knob,
The connector storage tray 7 is rotated to the original position. Finally, as shown in FIG. 26, the connector storage tray 7 is stored again in the unit case 8.

The termination box of the present invention is not limited to the above embodiment. For example, in the above-mentioned termination box 1, inside one tray unit 2,
One connection part storage tray 6 and one connector storage tray 7 were stored. However, a plurality of connection portion storage trays 6 corresponding to the optical connector 36 in the connector storage tray 7 may be provided, and these may be stacked and stored in one unit case. Alternatively, one connecting portion storage tray 6 and a plurality of corresponding connector storage trays 7 may be stacked and stored in one unit case. Alternatively, a plurality of connection part storage trays 6 and a plurality of corresponding connector storage trays 7 may be stacked and stored in one unit case.

[0048]

The optical termination box of the present invention comprises a connector accommodating tray, a connecting section accommodating tray stacked on the connector accommodating tray, and a branch optical fiber mounted from the connecting section accommodating tray to the connector accommodating tray. A tray unit including a core wire and a unit case for accommodating the connector storage tray and the connection portion storage tray in a stackable state so as to be drawn out is provided inside. Therefore, according to the present invention, the optical fiber can be processed in a space-efficient manner, and
The termination / connection work can be done easily.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a photo-termination box of the present invention.

FIG. 2 is a plan view of a tray unit.

FIG. 3 is a front view of the tray unit.

FIG. 4 is a right side view of the tray unit.

FIG. 5 is a plan view of a connection unit storage tray.

FIG. 6 is a plan view of a connector storage tray (lower tray).

FIG. 7 is a bottom view of a connector storage tray (lower tray).

FIG. 8 is a plan view of connector storage trays (a lower tray and an upper tray).

FIG. 9 is a plan view of a tray holding plate.

FIG. 10 is a bottom view showing the relationship (first stage) between the connector storage tray and the tray holding plate.

FIG. 11 is a bottom view showing the relationship (second stage) between the connector storage tray and the tray holding plate.

FIG. 12 is a bottom view showing the relationship (third stage) between the connector storage tray and the tray holding plate.

FIG. 13 is a bottom view showing the relationship (fourth stage) between the connector storage tray and the tray holding plate.

FIG. 14 is a perspective view showing a state in which a connection unit storage tray is pulled out.

FIG. 15 is a perspective view when pulling out a connector storage tray.

FIG. 16 is a perspective view showing a state in which a connector storage tray is pulled out.

FIG. 17 is a perspective view showing a state where the connector storage tray is rotated.

FIG. 18 is a perspective view showing a state (initial state) of a stopper.

FIG. 19 is a perspective view showing a state of the stopper (while the connector storage tray is rotating).

FIG. 20 is a perspective view showing a state of the stopper (after rotation of the connector storage tray).

FIG. 21 is a perspective view showing the connector storage tray with a protective sheet removed.

FIG. 22 is a perspective view showing a connector storage tray during connection of an optical fiber cord.

FIG. 23 is a perspective view showing a connector storage tray to which an optical fiber cord is connected.

FIG. 24 is a perspective view showing a connector storage tray to which all optical fiber cords are connected.

FIG. 25 is a perspective view showing a state of the stopper (when released).

FIG. 26 is a perspective view of the connector storing tray being returned to the inside of the unit case.

FIG. 27 is a plan view of the FO code.

FIG. 28 is a front view of a conventional termination box.

[Explanation of reference numerals] 1 ... Termination box, 2 ... Tray unit, 3 ... External optical cable, 6 ... Connection section storage tray, 7 ... Connector storage tray,
7b ... upper tray, 7a ... lower tray, 8 ... unit case, 9 ... tray holding plate, 10 ... branching optical fiber core wire,
19 ... Connection part holding part, 20 ... Extra length storage part, 26 ... S-shaped part storage part, 31 ... Extra length storage part, 35 ... Connector adapter,
36 ... Optical connector, 39 ... Indoor optical connector, 43 ... Rotating shaft, 45 ... Guide hole, 46 ... Optical fiber cord, 47
… Code storage.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hideaki Katayama             Aichi Prefecture Komaki City Higashi 1-chome 226 Japan Communications             Within Denryo Corporation (72) Inventor Ryo Murono             Aichi Prefecture Komaki City Higashi 1-chome 226 Japan Communications             Within Denryo Corporation (72) Inventor Hiroaki Tsuno             Osaka, Hirakata-shi             Leh Cold Heat Co., Ltd. F-term (reference) 2H038 CA38                 5G375 AA18 CA02 CA19 CC02 DB16                       DB23

Claims (5)

[Claims] 1. An optical termination box for terminating a plurality of tape-shaped optical fiber cores in an optical cable introduced from the outside into a single-core optical connector, and a connector storage tray for storing the plurality of optical connectors. A connecting portion storage tray that is arranged in a stack with respect to the connector storage tray and that stores a connecting portion with the optical fiber core wire in the optical cable; and an optical fiber core wire whose one end is connected to the optical fiber core wire in the optical cable. The other end is branched from the optical fiber core to terminate as the optical connector, and the branched optical fiber core is attached from the connection section storage tray to the connector storage tray, the connector storage tray and the connection section storage. An optical termination box comprising a tray unit, which comprises a unit case for accommodating trays that can be pulled out in a stacked state. 2. The connector storage tray has a plurality of the optical connectors arranged in a pull-out direction when stored in the unit case, and is rotated by about 90 degrees after being pulled out from the unit case to rotate the plurality of optical connectors. The optical termination box according to claim 1, further comprising a rotating mechanism for arranging the light emitting elements in a direction substantially perpendicular to the pulling-out direction. 3. The optical termination box according to claim 2, wherein the tray unit has a stopper mechanism for maintaining the state of the connector storage tray rotated by 90 degrees after being pulled out. 4. The light according to claim 1, wherein the tray units are provided inside in a state of being arranged in a matrix in a plane perpendicular to the drawing direction. Termination box. 5. The connection part storage tray stores a connection part holding part which stores a connection part between an optical fiber core wire in an optical cable and the branch optical fiber core wire, and an extra length part near the connection part. Has a long storage part on the front side of the drawer, and
5. An S-shaped portion storage portion for storing a part of the branched optical fiber core wire in an S-shape when stored in the unit case is provided on the inner side of the drawer. The termination box according to item 1.